<PAGE>
                                                                    EXHIBIT 10.4
                                  HILLS PLAZA I

                                  OFFICE LEASE

                         SRI HILLS PLAZA VENTURE, LLC,
                      a Delaware limited liability company,
                                    Landlord

                                       and

                              CRITICAL PATH, INC.,
                            a California corporation,
                                     Tenant

                         DATED AS OF: November 16, 2001



<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
Paragraph                                                                                Page
---------                                                                                ----
<S>                                                                                      <C>
        1.    Premises ...................................................................1
        2.    Certain Basic Lease Terms ..................................................1
        3.    Term; Delivery of Possession of Premises ...................................2
        4.    Premises As-Is .............................................................2
        5.    Monthly Rent ...............................................................4
        6.    Letter of Credit ...........................................................5
        7.    Additional Rent: Increases in Operating Expenses and Tax Expenses ..........5
        8.    Use of Premises; Compliance with Law .......................................9
        9.    Alterations and Restoration ................................................10
        10.   Repair .....................................................................12
        11.   Abandonment ................................................................12
        12.   Liens ......................................................................13
        13.   Assignment and Subletting ..................................................13
        14.   Indemnification of Landlord ................................................16
        15.   Insurance ..................................................................17
        16.   Mutual Waiver of Subrogation Rights ........................................18
        17.   Utilities ..................................................................18
        18.   Personal Property and Other Taxes ..........................................20
        19.   Rules and Regulations ......................................................20
        20.   Surrender; Holding Over ....................................................20
        21.   Subordination and Attornment ...............................................21
        22.   Financing Condition ........................................................22
        23.   Entry by Landlord ..........................................................22
        24.   Insolvency or Bankruptcy ...................................................22
        25.   Default and Remedies .......................................................23
        26.   Damage or Destruction ......................................................25
        27.   Eminent Domain .............................................................25
        28.   Landlord's Liability; Sale of Building .....................................26
        29.   Estoppel Certificates ......................................................27
        30.   Right of Landlord to Perform ...............................................27
        31.   Late Charge ................................................................27
        32.   Attorneys' Fees; Waiver of Jury Trial ......................................27
        33.   Waiver .....................................................................28
        34.   Notices ....................................................................28
        35.   Deleted ....................................................................28
        36.   Defined Terms and Marginal Headings ........................................28
        37.   Time and Applicable Law ....................................................28
        38.   Successors .................................................................28
        39.   Entire Agreement; Modifications ............................................28
        40.   Light and Air ..............................................................29
        41.   Name of Building ...........................................................29
        42.   Severability ...............................................................29
        43.   Authority ..................................................................29
        44.   No Offer ...................................................................29
        45.   Real Estate Brokers ........................................................29
        46.   Consents and Approvals .....................................................29
        47.   Reserved Rights ............................................................29
        48.   Financial Statements .......................................................30
        49.   Signage ....................................................................30
        50.   Nondisclosure of Lease Terms ...............................................31
        51.   Hazardous Substance Disclosure .............................................31
        52.   Option to Renew ............................................................31
        53.   Parking ....................................................................32
        54.   First Rights Contingency ...................................................33
        55.   Canine Access ..............................................................33
</TABLE>

EXHIBITS:

A - Outline of Premises
B - Rules and Regulations
C - Form of Letter of Credit


<PAGE>

                                      LEASE

        THIS LEASE is made as of the 16th day of November, 2001, between SRI
HILLS PLAZA VENTURE, LLC, a Delaware limited liability company ("Landlord"), and
CRITICAL PATH, INC., a California corporation ("Tenant").

               1. Premises. Landlord hereby leases to Tenant, and Tenant hereby
leases from Landlord, on the terms and conditions set forth herein, the space
outlined on the attached Exhibit A (the "Premises"). The Premises are located on
the floor(s) specified in Paragraph 2 below of the building (the "Building")
presently known as Hills Plaza Phase I, located at 345 Spear Street, San
Francisco, California. The Building is part of a combined office, retail and
residential condominium project (the "Project") located on the entire block of
Spear Street between Harrison Street and Folsom Street, in San Francisco,
California. The Building, the parcel(s) of land (the "Land") on which the
Building is located and any other improvements on the Land, the common areas of
the Project and the underground garage for the Project are referred to herein as
the "Real Property."

               Tenant's lease of the Premises shall include the right to use, in
common with others and subject to the other provisions of this Lease, the public
lobbies, entrances, stairs, elevators and other public portions of the Building.
All of the windows and outside walls of the Premises and any space in the
Premises used for shafts, stacks, pipes, conduits, ducts, electrical equipment
or other utilities or Building facilities are reserved solely to Landlord and
Landlord shall have rights of access through the Premises for the purpose of
operating, maintaining and repairing the same. Notwithstanding the preceding
sentence, during the term of this Lease Tenant shall have the non-exclusive
license, in common with use by Landlord and other tenants of the Building, to
use the vertical shafts and horizontal raceways and ducts within the Premises
for purposes of installation therein of telephone, data and electrical wires and
cables which are part of the Initial Alterations (as defined in Paragraph 4.a.)
or Alterations (as defined in Paragraph 9) approved by Landlord pursuant to this
Lease, provided that such license is more particularly set forth in an amendment
to this Lease executed by Landlord and Tenant.

               2. Certain Basic Lease Terms. As used herein, the following terms
shall have the meaning specified below:

                a.      Floors on which the Premises are located: Sixth (6th)
                        floor. Landlord and Tenant hereby stipulate for all
                        purposes of this Lease that the Premises contains a
                        total of 63,467 rentable square feet. The parties
                        further hereby stipulate that the portion of the
                        Premises shown on Exhibit A attached hereto as "Parcel
                        A" contains a total of 45,467 rentable square feet, and
                        that the portion of the Premises shown on Exhibit A
                        attached hereto as "Parcel B" contains a total of 18,000
                        rentable square feet. Notwithstanding the foregoing,
                        upon Tenant's notice to Landlord given no later than
                        five (5) days prior to the Parcel A Rent Commencement
                        Date (as defined in Paragraph 2.c. below), Tenant may
                        redesignate the portions of the Premises which comprise
                        Parcel A and Parcel B, respectively, provided that such
                        redesignated Parcel A shall in any event contain 45,467
                        rentable square feet, and such redesignated Parcel B
                        shall in any event contain 18,000 rentable square feet.
                        In the event of such redesignation, the parties shall
                        promptly enter into an amendment to this Lease showing
                        the so redesignated Parcels.

                b.      Lease term: The term of this Lease shall commence on the
                        date (the "Commencement Date") Landlord delivers the
                        Premises to Tenant in the condition required by the
                        first sentence of Paragraph 4.a below. The term of this
                        Lease shall end on the date (the "Expiration Date")
                        which is the last day of the one hundred twentieth
                        (120th) full calendar month following the Parcel A Rent
                        Commencement Date. The scheduled Commencement Date (the
                        "Scheduled Commencement Date") is one (1) Business Day
                        (as defined in Paragraph 17.a. below) following the
                        First Rights Contingency Satisfaction Date (as defined
                        in Paragraph 54 below) is satisfied.

                c.      Monthly Rent: The respective sums set forth as follows:

<TABLE>
<CAPTION>
                        Parcel A:
<S>                                                       <C>
                        Lease Years 1:                    $132,612.08
                        Lease Years 2, 3, 4 & 5:          $143,978.83
                        Lease Years 6, 7 & 8:             $147,767.75
                        Lease Years 9 & 10:               $155,345.58
</TABLE>


                                       1

<PAGE>

<TABLE>
<CAPTION>
                        Parcel B:
<S>                                                       <C>
                        Lease Years 1:                    $52,500.00
                        Lease Years 2, 3, 4 & 5:          $57,000.00
                        Lease Years 6, 7 & 8:             $58,500.00
                        Lease Years 9 & 10:               $61,500.00
</TABLE>

                        Notwithstanding the foregoing, Tenant's obligation to
                        pay Monthly Rent for Parcel A shall not commence until
                        the Parcel A Rent Commencement Date, and Tenant's
                        obligation to pay Monthly Rent for Parcel B shall not
                        commence until the Parcel B Rent Commencement Date.
                        Lease Year 1 shall commence on the Parcel A Rent
                        Commencement Date and end on the last day of the twelfth
                        (12th) full calendar month thereafter, and each
                        subsequent Lease Year shall be the twelve (12) full
                        calendar month period commencing on the day after the
                        expiration of the prior Lease Year. The "Parcel A Rent
                        Commencement Date" shall be the date that is the earlier
                        of (i) the date that is one hundred twenty (120) days
                        following the First Rights Contingency Satisfaction
                        Date, or (ii) the date Tenant commences occupancy of
                        Parcel A or any portion thereof for the conduct of
                        business. The "Parcel B Rent Commencement Date" shall be
                        the date that is the earlier of (i) January 1, 2003, or
                        (ii) the date Tenant commences occupancy of Parcel B or
                        any portion thereof for the conduct of business.

                d.      Letter of Credit: $2,500,000.

                e.      Tenant's Share: 16.38% (11.73% as to Parcel A and 4.65%
                        as to Parcel B).

                f.      Base Year: The calendar year 2002.

                        Base Tax Year: The fiscal tax year ending June 30, 2003.

                g.      Business of Tenant: Software and software related
                        services.

                h.      Real estate brokers: Shorenstein Management, Inc., and
                        Insignia, Esq.

               3. Term; Delivery of Possession of Premises.

                      a. The term of this Lease shall commence as provided in
Paragraph 2.b., and, unless sooner terminated pursuant to the terms hereof or at
law, shall expire on the Expiration Date (defined in Paragraph 2.b.). Upon
either party's request after the Commencement Date has occurred hereunder, the
parties shall execute a written confirmation of the Commencement Date and the
Expiration Date.

                      b. Landlord shall act diligently and in good faith to
deliver the Premises to Tenant on the Scheduled Commencement Date; provided,
however that Landlord shall have no obligation to deliver the Premises to Tenant
prior to Landlord's receipt of the Letter of Credit required of Tenant pursuant
to Paragraph 6 below. If Landlord, for any reason whatsoever, cannot deliver
possession of the Premises to Tenant on the Scheduled Commencement Date, this
Lease shall not be void or voidable, nor shall Landlord be liable to Tenant for
any loss or damage resulting therefrom, nor shall the same amend Tenant's
obligations under this Lease; provided, however, that in the event that Landlord
does not deliver the Premises to Tenant on or prior to the date that is thirty
(30) days after the Scheduled Commencement Date, as such date shall be extended
for delays caused by Force Majeure or Tenant's failure to deliver the Letter of
Credit (such date, as so extended, the "Trigger Date"), then Tenant shall have
the right to terminate this Lease by notice to Landlord given, if at all, within
ten (10) days after the Trigger Date. For purposes of this Lease, "Force
Majeure" shall mean strikes, lock-outs, labor disputes, shortages of material or
labor, fire, earthquake, flood or other casualty, acts of God, or any other
cause (other than financial inability) beyond the reasonable control of
Landlord, except that for purposes of this Paragraph 3.b. a holdover of the
Premises by any tenant or other occupant shall not be considered Force Majeure.

               4. Premises As-Is.

               a. Premises As-Is. Landlord shall deliver the Premises to Tenant,
and Tenant shall accept the Premises from Landlord, broom clean, but otherwise
in their "as is" state and condition as of the delivery date. Except as provided
below in this Paragraph 4, Landlord shall have no obligation to make or pay for
any improvements or renovations in or to the Premises or the Building or to
otherwise prepare the Premises or the Building for Tenant's occupancy. The
parties acknowledge that Tenant intends to make certain alterations and
improvements (the "Initial Alterations") to the Premises after the delivery
thereof to prepare the same for Tenant's initial occupancy. The construction of
the Initial Alterations shall be governed by Paragraph 9 hereof. The general
contractor selected by Tenant in accordance with Paragraph 9 hereof to construct
the Initial Alterations is referred to hereinafter as "Contractor." Landlord
agrees that Tenant shall have the right to utilize any furniture, equipment or
improvements existing in the Premises as of the


                                       2
<PAGE>

Commencement Date, and if Tenant shall remove the same from the Premises in
connection with the construction of the Initial Alterations or subsequently
approved Alterations, any salvage value or proceeds attributable thereto shall
belong solely to Tenant.

               b. Landlord's Allowance. Landlord shall contribute toward the
cost of the design, construction and installation of the Initial Alterations
(including, without limitation, Contractor's fee and, if Tenant does not select
Turner-Shorenstein, L.P. ("TSLP") as Contractor, the Alteration Operations Fee
provided for in Paragraph 9) an amount not to exceed Two Million Six Hundred
Sixty-Five Thousand Six Hundred Fourteen Dollars ($2,665,614.00) (which equals
$42.00 per rentable square foot of the Premises) ("Landlord's Allowance");
provided, however that not more than Two Hundred Fifty-Three Thousand Eight
Hundred Sixty-Eight Dollars ($253,868.00) (which equals $4.00 per rentable
square foot of the Premises) of Landlord's Allowance may be applied to Tenant's
reasonable space planning, architectural and engineering costs for the design of
the Initial Alterations. No portion of Landlord's Allowance may be applied to
the cost of personal property, equipment, trade fixtures, moving expenses,
furniture (including work stations and modular office furniture, regardless of
the method of attachment to walls and/or floors), signage or, except as provided
below, free rent. In the event that after completion of the Initial Alterations
and payment of the total cost thereof (including the Alteration Operations Fee
due pursuant to Paragraph 9.a. below in connection therewith), the entire amount
of Landlord's Allowance has not been utilized, the remaining portion of
Landlord's Allowance, but not to exceed Six Hundred Thirty-Four Thousand Six
Hundred Seventy Dollars ($634,670.00) (which equals $10.00 per rentable square
foot of the Premises), may be applied against the Monthly Rent first due from
Tenant pursuant to this Lease. Tenant acknowledges that Landlord's Allowance is
to be applied to the Initial Alterations (and the associated costs described
above) covering the entire Premises (i.e. all of Parcel A and Parcel B). If
Tenant does not improve the entire Premises, then, without limitation of any
other rights or remedies of Landlord hereunder, Landlord's Contribution shall be
adjusted on a prorata per rentable square foot basis to reflect the number of
rentable square feet actually being improved. For purposes of the preceding
sentence, space shall be conclusively deemed "improved" if it has finished
ceilings, floors and walls, with Building systems furnished thereto (e.g.
lighting, HVAC, sprinklers and other fire and life safety equipment), that
reflects a continuity of design concept to the balance of the Premises, and is
in a condition which would allow for legal occupancy of the space for general
office purposes. Notwithstanding anything to the contrary in this Paragraph
4.b., Landlord's Allowance shall be available for disbursement pursuant to the
terms hereof only for the first twelve (12) months after the Commencement Date.
Accordingly, if any portion of Landlord's Allowance is not utilized prior to the
date that is twelve (12) months from the Commencement Date, such unused portion
shall be forfeited by Tenant.

               Landlord shall disburse Landlord's Allowance directly to
Contractor, or subcontractors, or Tenant's design consultants as provided in
clause (i) above, or to Tenant, as Landlord shall determine, in monthly
installments. Each disbursement shall be conditioned upon Landlord's receipt of
invoices to be furnished by Tenant covering work actually performed,
construction in place and materials delivered to the site (as may be
applicable). To the extent permitted by law, Landlord may withhold the amount of
any and all retention percentages provided for in original contracts or
subcontracts until the earlier of (i) the expiration of the applicable lien
period or (ii) Landlord's receipt of a waiver of lien rights from the general
contractor, subcontractors or suppliers whose invoices are applicable to the
respective disbursement for, and/or on account of, the work or materials covered
by such invoice. In the event the cost of the Initial Alterations exceeds
Landlord's Allowance set forth above, Tenant shall pay all such excess costs
(the "Excess Cost"), after the full amount of Landlord's Allowance has been
disbursed hereunder (other than the retentions described above), directly to
Contractor or the subcontractors or suppliers involved and shall furnish to
Landlord copies of receipted invoices therefor and such waivers of lien rights
as Landlord may reasonably require.

               If the Alteration Operations Fee is applicable, then, at the time
Landlord makes any disbursement of Landlord's Allowance, Landlord shall retain
from Landlord's Allowance, as a partial payment of the Alteration Operations
Fee, a proportionate amount of the Alteration Operations Fee based upon
Landlord's reasonable estimation of the amount required to be withheld from each
disbursement in order to ensure that the entire Alteration Operations Fee is
retained over the course of construction on a prorata basis. At such time as
Landlord's Allowance has been entirely disbursed, Tenant shall, within fifteen
(15) days of written demand, pay to Landlord the remainder, if any, of the
Alteration Operations Fee not yet paid to Landlord.

               In addition to Landlord's Allowance, Landlord shall pay for the
entire cost of the Landlord's Work described in Paragraph 4.c. below.

               c. Landlord's Work. Regardless of whether Tenant selects TSLP or
another general contractor as Contractor, Landlord shall cause TSLP to perform
the following work ("Landlord's Work") at Landlord's cost:

                i.      Perform all work necessary within the finished walls of
                        the existing core area restrooms on the sixth (6th)
                        floor of the Building to cause such restrooms to comply
                        with The Americans With Disabilities Act, to the extent
                        such work is required to cause such restrooms to comply,
                        as of Landlord's Work


                                       3
<PAGE>

                        Completion Date (as defined below), with the provisions
                        of the ADA that are applicable to such restrooms as of
                        such date.

                ii.     Demolish existing stairs connecting the fifth (5th) and
                        sixth (6th) floors of the Building (including rails and
                        perimeter railing). Furnish and install new steel beams
                        and/or reinforce existing beams around stair opening.
                        Furnish and install new metal decking at opening. Pour
                        lightweight concrete on top of metal decking to finished
                        floor. Fireproof deck and beams as required.

                iii.    Perform all work necessary (if any) to cause the common
                        areas of the Building that are reasonably anticipated to
                        be in Tenant's path of travel to the Premises to comply
                        with the ADA, to the extent such work is required to
                        cause such common areas to comply, as of Landlord's Work
                        Completion Date, with the provisions of the ADA that are
                        applicable to such common areas as of such date.

In no event shall Landlord's Work include any work required by reason of or
triggered by (x) the Initial Alterations or any other Alterations of Tenant
(except as required pursuant to Paragraph 8.b. below), (y) Tenant's particular
use of the Premises (as opposed to Tenant's use of the Premises for their
permitted purposes in a normal and customary manner), or (z) Tenant's particular
employees or employment practices or the canine access rights granted to Tenant
pursuant to Paragraph 55 below. Landlord's Work may be performed during the
period of construction of the Initial Alterations, and shall in any event be
substantially completed on or prior to the date ("Landlord's Work Completion
Date") that is the later of February 15, 2002 or the Rent Commencement Date,
subject to extension for delays caused by Force Majeure or by Tenant (including
Tenant's construction of the Initial Alterations). If Tenant does not select
TSLP as Contractor, Landlord and Tenant shall cause their respective contractors
to cooperate with each other in the coordination of the construction of
Landlord's Work and the Initial Alterations. Landlord's Work shall be
"substantially completed" for purposes of the foregoing so long as any remaining
portions of Landlord's Work are so-called "punch list" items which do not
preclude issuance of a certificate of occupancy (or other permit for legal
occupancy) for the Premises which would have otherwise been issued. Landlord
shall promptly complete such punch list items.

        5. Monthly Rent.

               a. Beginning on the Parcel A Rent Commencement Date, and
thereafter on or before the first day of each calendar month during the term
hereof, Tenant shall pay to Landlord, as monthly rent for Parcel A, the Monthly
Rent specified in Paragraph 2 above. Beginning on the Parcel B Rent Commencement
Date, and thereafter on or before the first day of each calendar month during
the term hereof, Tenant shall pay to Landlord, as monthly rent for Parcel B, the
Monthly Rent specified in Paragraph 2 above. If the Parcel A Rent Commencement
Date or the Parcel B Rent Commencement Date is a day other than the first day of
a calendar month, or if the term of this Lease terminates on a day other than
the last day of a calendar month, then the Monthly Rent payable for such partial
month shall be appropriately prorated on the basis of a thirty (30)-day month.
Monthly Rent and the Additional Rent specified in Paragraph 7 shall be paid by
Tenant to Landlord, in advance, without deduction, offset, prior notice or
demand (except as expressly set forth in this Lease), in immediately available
funds of lawful money of the United States of America, or by good check as
described below, at the office of Shorenstein Company, L.P., at 555 California
Street, 49th floor, San Francisco, California 94104, or to such other person or
at such other place as Landlord may from time to time designate in writing.
Payments made by check must be drawn either on a California financial
institution or on a financial institution that is a member of the federal
reserve system. Notwithstanding the foregoing, Tenant shall pay to Landlord
within one (1) Business Day after the First Rights Contingency Satisfaction
Date, the Monthly Rent due for Parcel A for the first full calendar month after
the Parcel A Rent Commencement Date, and such payment shall be applied against
the Monthly Rent first due under this Lease.

               b. All amounts payable by Tenant to Landlord under this Lease, or
otherwise payable in connection with Tenant's occupancy of the Premises, in
addition to the Monthly Rent hereunder and Additional Rent under Paragraph 7,
shall constitute rent owed by Tenant to Landlord hereunder.

               c. Any rent not paid by Tenant to Landlord within five (5) days
after the date due shall bear interest from the date due to the date of payment
by Tenant at an annual rate of interest (the "Interest Rate") equal to the
lesser of (i) the maximum annual interest rate allowed by law on such due date
for business loans (not primarily for personal, family or household purposes)
not exempt from the usury law, or (ii) a rate equal to the sum of four (4)
percentage points over the six-month United States Treasury bill rate (the
"Treasury Rate") in effect from time to time during such delinquency (or if
there is no such publicly announced rate, the rate quoted by the San Francisco
Main Office of Bank of America, N.A., or any successor bank thereto, in pricing
ninety (90)-day commercial loans to substantial commercial borrowers).
Notwithstanding the foregoing, Landlord shall give Tenant notice of non-payment
of rent when due and five (5) days after delivery of such notice to cure such
non-payment once in each calendar year before assessing interest in such
calendar year pursuant to this Paragraph 5.c. Failure by Tenant to pay rent when
due, including any interest accrued under this subparagraph, after the
expiration of any applicable notice and cure


                                       4
<PAGE>

period provided in Paragraph 25.a. below, shall constitute an Event of Default
(as defined in Paragraph 25 below) giving rise to all the remedies afforded
Landlord under this Lease and at law for nonpayment of rent.

               d. No security or guaranty which may now or hereafter be
furnished to Landlord for the payment of rent due hereunder or for the
performance by Tenant of the other terms of this Lease shall in any way be a bar
or defense to any of Landlord's remedies under this Lease or at law.

        6. Letter of Credit.

               a. As security for the performance by Tenant of Tenant's
obligations hereunder, Tenant shall cause to be delivered to Landlord within one
(1) Business Day after the First Rights Contingency Satisfaction Date, an
original irrevocable standby letter of credit (the "Letter of Credit") in the
amount of Two Million Five Hundred Thousand Dollars ($2,500,000.00), naming
Landlord as beneficiary, which Landlord may draw upon to cure any Event of
Default under this Lease (or any default under this Lease where there exist
circumstances under which Landlord is enjoined or otherwise prevented by
operation of law from giving to Tenant a written notice which would be necessary
for such failure of performance to constitute an Event of Default under this
Lease), or to compensate Landlord for any damage Landlord incurs as a result of
Tenant's failure to perform any of its obligations hereunder; provided, however,
that neither the Letter of Credit nor any proceeds therefrom shall be deemed an
advance rent deposit or an advance payment of any other kind, or a measure or
limitation of Landlord's damages or constitute a bar or defense to any of the
Landlord's other remedies under this Lease or at law upon Tenant's default. The
Letter of Credit shall be issued by a major national commercial bank reasonably
acceptable to Landlord, with a service and claim point for the Letter of Credit
in San Francisco, California, have an expiration date not earlier than sixty
(60) days after the Expiration Date (or, in the alternative, have a term of not
less than one (1) year and be automatically renewable for an additional one (1)
year period unless notice of non-renewal is given by the issuer to Landlord not
later than sixty (60) days prior to the expiration thereof) and shall provide
that Landlord may make partial and multiple draws thereunder, up to the face
amount thereof. The Letter of Credit shall be in the form attached hereto as
Exhibit C (as modified to the extent required to comply with any changes after
the date hereof to laws applicable thereto), and shall otherwise be in form and
content satisfactory to Landlord. If the Letter of Credit has an expiration date
earlier than sixtieth (60th) day after the Expiration Date, then throughout
the term hereof (including any renewal or extension of the term) Tenant shall
provide evidence of renewal of the Letter of Credit to Landlord at least
forty-five (45) days prior to the date the Letter of Credit expires. If Landlord
draws on the Letter of Credit pursuant to the terms hereof, Tenant shall
immediately replenish the Letter of Credit or provide Landlord with an
additional letter of credit conforming to the requirement of this paragraph so
that the amount available to Landlord from the Letter(s) of Credit provided
hereunder is the amount specified above. Tenant's failure to deliver any
replacement, additional or extension of the Letter of Credit, or evidence of
renewal of the Letter of Credit, within the time specified under this Lease
shall entitle Landlord to draw upon the Letter of Credit then in effect. If
Landlord liquidates the Letter of Credit as provided in the preceding sentence,
Landlord shall hold the funds received from the Letter of Credit as security for
Tenant's performance under this Lease, and Landlord shall be deemed to hold a
perfected, first priority security interest in such funds (and Tenant does
hereby appoint Landlord its attorney-in-fact for purposes of filing such
financing statements or other instruments as Landlord shall deem advisable to
further evidence and/or perfect such security interest). Landlord shall not be
required to segregate such security deposit from its other funds and no interest
shall accrue or be payable to Tenant with respect thereto. No holder of a
Superior Interest (as defined in Paragraph 21 below), nor any purchaser at any
judicial or private foreclosure sale of the Real Property or any portion
thereof, shall be responsible to Tenant for such security deposit unless and
only to the extent such holder or purchaser shall have actually received the
same. If Landlord transfers such security deposit to the grantee or transferee
of Landlord's interest in the Real Property, Landlord shall be released from any
further responsibility or liability for such security. If Tenant is not in
default at the expiration or termination of this Lease, Landlord shall return to
Tenant the Letter of Credit or the balance of the security deposit then held by
Landlord, as applicable, within sixty (60) days thereafter; provided, however,
that in no event shall any such return be construed as an admission by Landlord
that Tenant has performed all of its covenants and obligations hereunder.

               b. Notwithstanding the foregoing, on the commencement of Lease
Year 6, and on the commencement of each Lease Year thereafter (each such
anniversary, a "Reduction Date"), so long as no Event of Default (as defined in
Paragraph 25 below) by Tenant under this Lease has occurred and is continuing as
of such Reduction Date, and so long as no breach or default by Tenant under this
Lease which, with notice or the passage of time or both could ripen into an
Event of Default (an "Unmatured Default"), shall be continuing as of the
Reduction Date, the amount required under the Letter of Credit shall be reduced
by Five Hundred Thousand Dollars ($500,000.00). Accordingly, if all Reductions
are made as so scheduled, during Lease Year 10 the Letter of Credit will be
reduced to zero and will not be required. If Tenant is entitled to such
reduction, Tenant may replace or amend the then existing Letter of Credit to
reflect such reduced amount on or after the applicable Reduction Date. If
Landlord disallows any such reduction by reason of an Unmatured Default, and if
Tenant cures the Unmatured Default prior to the same becoming an Event of
Default, the date that is five (5) days after the date such Unmatured Default is
cured shall become the new Reduction Date for purposes of making the reduction
which was previously disallowed.

        7. Additional Rent: Increases in Operating Expenses and Tax Expenses.


                                       5
<PAGE>

               a. Operating Expenses. Tenant shall pay to Landlord, at the times
hereinafter set forth, Tenant's Share, as specified in Paragraph 2.e. above, of
any increase in the Operating Expenses (as defined below) incurred by Landlord
in each calendar year subsequent to the Base Year specified in Paragraph 2.f.
above, over the Operating Expenses incurred by Landlord during the Base Year.
The amounts payable under this Paragraph 7.a. and Paragraph 7.b. below are
termed "Additional Rent" herein.

        The term "Operating Expenses" shall mean the total costs and expenses
incurred by Landlord in connection with the management, operation, maintenance,
repair and ownership of the Real Property, including, without limitation, the
following costs: (1) salaries, wages, bonuses and other compensation (including
hospitalization, medical, surgical, retirement plan, pension plan, union dues,
life insurance, including group life insurance, welfare and other fringe
benefits, and vacation, holidays and other paid absence benefits) relating to
employees of Landlord or its agents engaged in the operation, repair, or
maintenance of the Real Property; (2) payroll, social security, workers'
compensation, unemployment and similar taxes with respect to such employees of
Landlord or its agents, and the cost of providing disability or other benefits
imposed by law or otherwise, with respect to such employees; (3) the cost of
uniforms (including the cleaning, replacement and pressing thereof) provided to
such employees; (4) premiums and other charges incurred by Landlord with respect
to fire, other casualty, rent and liability insurance, any other insurance as is
deemed necessary or advisable in the reasonable judgment of Landlord, or any
insurance required by the holder of any Superior Interest (as defined in
Paragraph 21 below), and, after the Base Year, costs of repairing an insured
casualty to the extent of the deductible amount under the applicable insurance
policy; provided that, if Landlord does not carry earthquake insurance during
the Base Year, but obtains earthquake insurance subsequent to the Base Year,
then the initial annual premium for the earthquake insurance shall not be
included in Operating Expenses, and Operating Expenses in any given year
subsequent to the first calendar year in which Landlord obtains earthquake
insurance shall include only the increases in the annual premium over the annual
premium paid for the earthquake insurance for the first calendar year after the
Base Year in which Landlord carries the same; (5) water charges and sewer rents
or fees; (6) license, permit and inspection fees; (7) sales, use and excise
taxes on goods and services purchased by Landlord in connection with the
operation, maintenance or repair of the Real Property and Building systems and
equipment; (8) telephone, telegraph, postage, stationery supplies and other
expenses incurred in connection with the operation, maintenance, or repair of
the Real Property; (9) management fees and expenses; (10) costs of repairs to
and maintenance of the Real Property, including building systems and
appurtenances thereto and normal repair and replacement of worn-out equipment,
facilities and installations, but excluding the replacement of major building
systems (except to the extent provided in (16) and (17) below); (11) fees and
expenses for janitorial, window cleaning, guard, extermination, water treatment,
rubbish removal, plumbing and other services and inspection or service contracts
for elevator, electrical, mechanical and other building equipment and systems or
as may otherwise be necessary or proper for the operation, repair or maintenance
of the Real Property; (12) costs of supplies, tools, materials, and equipment
used in connection with the operation, maintenance or repair of the Real
Property; (13) accounting, legal and other professional fees and expenses; (14)
fees and expenses for painting the exterior or the public or common areas of the
Building and the cost of maintaining the sidewalks, landscaping and other common
areas of the Real Property; (15) costs and expenses for electricity, chilled
water, air conditioning, water for heating, gas, fuel, steam, heat, lights,
power and other energy related utilities required in connection with the
operation, maintenance and repair of the Real Property; (16) the cost of any
capital improvements made by Landlord to the Real Property or capital assets
acquired by Landlord after the Base Year in order to comply with any local,
state or federal law, ordinance, rule, regulation, code or order of any
governmental entity or insurance requirement (collectively, "Legal Requirement")
with which the Real Property was not required to comply during the Base Year, or
to comply with any amendment or other change to the enactment or interpretation
of any Legal Requirement from its enactment or interpretation during the Base
Year; (17) the cost of any capital improvements made by Landlord to the Building
or capital assets acquired by Landlord after the Base Year for the protection of
the health and safety of the occupants of the Real Property or that are designed
to reduce other Operating Expenses; (18) the cost of furniture, draperies,
carpeting, landscaping and other customary and ordinary items of personal
property (excluding paintings, sculptures and other works of art) provided by
Landlord for use in common areas of the Building or in the Building office (to
the extent that such Building office is dedicated to the operation and
management of the Real Property); (19) any expenses and costs resulting from
substitution of work, labor, material or services in lieu of any of the above
itemizations, or for any additional work, labor, services or material resulting
from compliance with any Legal Requirement applicable to the Real Property or
any parts thereof (excluding costs of capital improvements made in order to
comply with Legal Requirements with which the Real Property was required to
comply during the Base Year); (20) Building office rent or rental value, to the
extent that such Building office is dedicated to the operation and management of
the Real Property; and (21) the Building's prorata share of the Project costs
under the Master Declaration (as described in Paragraph 21 below).
Notwithstanding anything to the contrary herein, as to the common areas of the
Project and the garage of the Project, Operating Expenses shall include only the
Building's prorata share (as reasonably determined by Landlord in its good faith
business judgment) of the above described costs and expenses for such common
areas and garage of the Project. Further, Landlord and Tenant acknowledge that
certain of the building systems serving the Building also serve the other office
building in the Project and that certain of the improvements, alterations or
repairs made by Landlord to the Building or the Land that are properly included
in Operating Expenses pursuant to the above may be a part of improvements,
alterations or repairs that also benefit the other office building in the
Project. In light of the foregoing, Landlord shall determine, in its reasonable
and good faith business judgment, the proper allocation


                                       6
<PAGE>

of any such item of Operating Expenses between the Building and any other
building that benefits from the Operating Expense so that Tenant shall be
responsible only for Operating Expenses to the extent they are attributable or
allocable to the Building and the Land. Landlord and Tenant also acknowledge
that certain of the items of Operating Expenses referenced above are applicable
only to the office space within the Building and certain of such items are
applicable to both the office space and the retail space in the Building.
Landlord shall properly allocate the cost of such items to the office space and
to the retail space in accordance with standard accounting principles. With
respect to the costs of items included in Operating Expenses under (16) and
(17), such costs shall be amortized over a reasonable period, as determined by
Landlord, together with interest on the unamortized balance at a rate per annum
equal to three (3) percentage points over the Treasury Rate charged at the time
such item is constructed or acquired, or at such higher rate as may have been
paid by Landlord on funds borrowed for the purpose of constructing or acquiring
such item, but in either case not more than the maximum rate permitted by law at
the time such item is constructed or acquired.

        Operating Expenses shall not include the following: (i) depreciation on
the Building or equipment or systems therein; (ii) debt service; (iii) rental
under any ground or underlying lease; (iv) interest (except as expressly
provided in this Paragraph 7.a.); (v) Tax Expenses (as defined in Paragraph 7.b.
below); (vi) attorneys' and other professional fees and expenses incurred in
connection with lease negotiations with prospective or existing Building tenants
or the enforcement of leases affecting the Real Property; (vii) the cost
(including any amortization thereof) of any improvements or alterations which
would be properly classified as capital expenditures according to generally
accepted property management practices (except to the extent expressly included
in Operating Expenses pursuant to this Paragraph 7.a.); (viii) the cost of
decorating, improving for tenant occupancy, painting or redecorating portions of
the Building to be demised to tenants; (ix) wages, salaries, benefits or other
similar compensation paid to executive employees of Landlord or Landlord's
agents above the rank of Building manager; (x) advertising and promotional
expenditures, and costs of signage identifying any tenant of the Building (other
than Building directory or floor directory signage); (xi) real estate broker's
or other leasing commissions; (xii) penalties or other costs incurred due to a
violation by Landlord, as determined by written admission, stipulation, final
judgment or arbitration award, of any of the terms and conditions of this Lease
or any other lease relating to the Building except to the extent such costs
reflect costs that would have been incurred by Landlord absent such violation;
(xiii) subject to the provisions of item (4) above, repairs and other work
occasioned by fire, windstorm or other casualty, to the extent Landlord is
reimbursed by insurance proceeds, and other work paid from insurance or
condemnation proceeds; (xiv) costs, penalties or fines arising from Landlord's
violation of any applicable governmental rule or authority except to the extent
such costs reflect costs that would have been incurred by Landlord absent such
violation; (xv) overhead and profit increments (including as part of management
fees) paid to subsidiaries or affiliates of Landlord for management or other
services on or to the Building or for supplies or other materials to the extent
that the cost of the services, supplies or materials materially exceed the
amounts normally payable for similar goods and services under similar
circumstances (taking into account the market factors in effect on the date any
relevant contracts were negotiated) in comparable buildings in the San Francisco
financial district; (xvi) charitable and political contributions; (xviii)
rentals and other related expenses incurred in leasing air conditioning systems,
elevators or other equipment ordinarily considered to be of a capital nature
(except equipment that is not affixed to the Building and is used in providing
janitorial services, and except to the extent such costs would otherwise be
includable pursuant to items (16) and (17) as set forth in the immediately
preceding paragraph); (xix) costs directly and solely attributable to the garage
in the Building, including, without limitation, payroll for clerks, attendants,
book-keeping, parking, insurance premiums, parking management fees, parking
tickets, janitorial services, striping and painting of surfaces (provided,
however, that the cost of providing utilities to the garage shall be included in
Operating Expenses); (xx) any expense for which Landlord is actually directly
reimbursed by a tenant or other party (other than through a provision similar to
the first paragraph of this Paragraph 7.a.), including, without limitation,
payments for Excess Services; (xxii) the cost of services made available at no
additional charge to any tenant in the Building but not to Tenant; or (xxiii)
the cost of any Hazardous Materials (as defined in Paragraph 8.c. below)
abatement or removal activities where such activities are not necessitated by
the Handling (as defined in Paragraph 8.c. below) of Hazardous Materials by
Tenant or any other Tenant Party, provided, however, Operating Expenses may
include the costs attributable to those actions taken by Landlord in connection
with the ordinary operation and maintenance of the Building, including costs
incurred in removing limited amounts of Hazardous Materials from the Building
when such removal is directly related to such ordinary maintenance and
operation.

               b. Tax Expenses. Tenant shall pay to Landlord as Additional Rent
under this Lease, at the times hereinafter set forth, Tenant's Share, as
specified in Paragraph 2.e. above, of any increase in Tax Expenses (as defined
below) incurred by Landlord in each calendar year, over Tax Expenses incurred by
Landlord during the Base Tax Year. Notwithstanding the foregoing, if any
reassessment, reduction or recalculation of any item included in Tax Expenses
during the term results in a reduction of Tax Expenses, then for purposes of
calculating Tenant's Share of increases in Tax Expenses from and after the
calendar year in which such adjustment occurs, Tax Expenses for the Base Tax
Year shall be adjusted to reflect such reduction.

        The term "Tax Expenses" shall mean all taxes, assessments (whether
general or special), excises, transit charges, housing fund assessments or other
housing charges, improvement districts, levies or fees, ordinary or
extraordinary, unforeseen as well as foreseen, of any kind, which are assessed,
levied, charged,


                                       7
<PAGE>

confirmed or imposed on the Real Property, on Landlord with respect to the Real
Property, on the act of entering into leases of space in the Real Property, on
the use or occupancy of the Real Property or any part thereof, with respect to
services or utilities consumed in the use, occupancy or operation of the Real
Property, on any improvements, fixtures and equipment and other personal
property of Landlord located in the Real Property and used in connection with
the operation of the Real Property, or on or measured by the rent payable under
this Lease or in connection with the business of renting space in the Real
Property, including, without limitation, any gross income tax or excise tax
levied with respect to the receipt of such rent, by the United States of
America, the State of California, the City and County of San Francisco, any
political subdivision, public corporation, district or other political or public
entity or public authority, and shall also include any other tax, fee or other
excise, however described, which may be levied or assessed in lieu of, as a
substitute (in whole or in part) for, or as an addition to, any other Tax
Expense. Tax Expenses shall include reasonable attorneys' fees, costs and
disbursements incurred in connection with proceedings to contest, determine or
reduce Tax Expenses. If it shall not be lawful for Tenant to reimburse Landlord
for any increase in Tax Expenses as defined herein, the Monthly Rent payable to
Landlord prior to the imposition of such increases in Tax Expenses shall be
increased to net Landlord the same net Monthly Rent after imposition of such
increases in Tax Expenses as would have been received by Landlord prior to the
imposition of such increases in Tax Expenses.

        Tax Expenses shall not include income, franchise, transfer, inheritance
or capital stock taxes, unless, due to a change in the method of taxation, any
of such taxes is levied or assessed against Landlord in lieu of, as a substitute
(in whole or in part) for, or as an addition to, any other charge which would
otherwise constitute a Tax Expense; nor shall Tax Expenses include interest,
fines or other penalties imposed by reason of Landlord's failure to pay Tax
Expenses prior to delinquency, unless such failure occurs during any calendar
year in which Tenant has failed to timely pay any Monthly Rent, Additional Rent
or other amounts payable by Tenant to Landlord pursuant to this Lease. Landlord
and Tenant acknowledge and agree that certain other buildings exist or encroach
upon the Land, that Tenant shall have no liability as to any item of Tax Expense
attributable or allocable to, or assessed against, buildings other than the
Building and that Landlord's good faith determination of the proper allocation
of any item of Tax Expense allocable to buildings other than the Building shall
be binding on Landlord and Tenant.

               c. Adjustment for Occupancy Factor. Notwithstanding any other
provision herein to the contrary, in the event the Building is not fully
occupied during the Base Year or any calendar year during the term after the
Base Year, an adjustment shall be made by Landlord in computing Operating
Expenses for the Base Year and such calendar year so that those Operating
Expenses which vary based on levels of occupancy shall be computed for such year
as though the Building had been fully occupied during such year. In addition, if
any particular work or service includable in Operating Expenses is not furnished
to a tenant who has undertaken to perform such work or service itself, Operating
Expenses shall be deemed to be increased by an amount equal to the additional
Operating Expenses which would have been incurred if Landlord had furnished such
work or service to such tenant. The parties agree that statements in this Lease
to the effect that Landlord is to perform certain of its obligations hereunder
at its own or sole cost and expense shall not be interpreted as excluding any
cost from Operating Expenses or Tax Expenses if such cost is an Operating
Expense or Tax Expense pursuant to the terms of this Lease.

               d. Intention Regarding Expense Pass-Through. It is the intention
of Landlord and Tenant that the Monthly Rent paid to Landlord throughout the
term of this Lease shall be absolutely net of all increases, respectively, in
Tax Expenses and Operating Expenses over, respectively, Tax Expenses for the
Base Tax Year and Operating Expenses for the Base Year, and the foregoing
provisions of this Paragraph 7 are intended to so provide.

               e. Notice and Payment. On or before the first day of each
calendar year during the term hereof subsequent to the Base Year, or as soon as
practicable thereafter, Landlord shall give to Tenant notice of Landlord's
estimate of the Additional Rent, if any, payable by Tenant pursuant to
Paragraphs 7.a. and 7.b. for such calendar year subsequent to the Base Year. On
or before the first day of each month during each such subsequent calendar year,
Tenant shall pay to Landlord one-twelfth (1/12th) of the estimated Additional
Rent; provided, however, that if Landlord's notice is not given prior to the
first day of any calendar year Tenant shall continue to pay Additional Rent on
the basis of the prior year's estimate until the month after Landlord's notice
is given. If at any time it appears to Landlord that the Additional Rent payable
under Paragraphs 7.a. and/or 7.b. will vary from Landlord's estimate by more
than five percent (5%), Landlord may, by written notice to Tenant, revise its
estimate for such year, and subsequent payments by Tenant for such year shall be
based upon the revised estimate. On the first monthly payment date after any new
estimate is delivered to Tenant, Tenant shall also pay any accrued cost
increases, based on such new estimate.

               f. Annual Accounting. Landlord shall maintain true, correct and
complete records of the Operating Expenses and Tax Expenses in accordance with
sound accounting practices. Within ninety (90) days after the close of each
calendar year subsequent to the Base Year, or as soon after such ninety (90) day
period as practicable, but in any event within one hundred eighty (180) days
after the close of each such calendar year, Landlord shall deliver to Tenant a
statement of the Additional Rent payable under Paragraphs 7.a. and 7.b. for such
year. The statement shall be based on the results of an audit of the operations
of the Building prepared for the applicable year by a nationally recognized
certified public accounting firm selected


                                       8
<PAGE>

by Landlord. Upon Tenant's request made no later than ninety (90) days after
receipt of Landlord's annual statement, Landlord shall promptly deliver to
Tenant a copy of the auditor's statement on which Landlord's annual statement is
based, and such other information regarding the annual statement as may be
reasonably requested by Tenant to ascertain Landlord's compliance with this
Paragraph 7. At Landlord's option, Landlord may deliver such auditor's statement
to Tenant together with Landlord's annual statement, or otherwise deliver such
auditor's statement to Tenant prior to Tenant's request therefor. Landlord's
annual statement shall be final and binding upon Landlord and Tenant (except for
revisions to take into account any subsequent reassessment affecting the
calculation of Tax Expenses included in such statement, which revisions shall be
made if at all, within one hundred eighty (180) days after the close of the
calendar year in which Landlord receives the revised tax bill) unless, within
sixty (60) days after Tenant's receipt thereof or Tenant's receipt of any such
revisions due to a reassessment or Tenant's receipt of any correction thereof by
Landlord pursuant to the following provisions, as applicable), Tenant shall
contest or Landlord shall correct any item therein by giving written notice to
the other, specifying each item contested or corrected, respectively, and the
reason therefor. If the annual statement shows that Tenant's payments of
Additional Rent for such calendar year pursuant to Paragraph 7.e. hereof
exceeded Tenant's obligations for the calendar year, Landlord shall at its
option either (1) credit the excess to the next succeeding installments of rent
or (2) pay the excess to Tenant within thirty (30) days after delivery of such
statement. If the annual statement shows that Tenant's payments of Additional
Rent for such calendar year pursuant to Paragraph 7.e. hereof were less than
Tenant's obligation for the calendar year, Tenant shall pay the deficiency to
Landlord within thirty (30) days after delivery of such statement.

               g. Proration for Partial Lease Year. If this Lease terminates on
a day other than the last day of a calendar year, the Additional Rent payable by
Tenant pursuant to this Paragraph 7 applicable to the calendar year in which
this Lease terminates shall be prorated on the basis that the number of days
from the commencement of such calendar year to and including such termination
date bears to three hundred sixty-five (365).

        8. Use of Premises; Compliance with Law.

               a. Use of Premises. The Premises shall be used solely for general
office purposes for the business of Tenant as described in Paragraph 2.g. above
(which includes a server room) or for any other general office use consistent
with the operation of the Building as a first-class high-rise office building in
the San Francisco financial district, and for no other use or purpose. Landlord
represents and warrants to Tenant that the Building is zoned and otherwise
entitled so as to permit the Premises to be used for general office purposes,
provided, however, that the foregoing shall not relieve Tenant from
responsibility for obtaining a building permit and other applicable permits in
connection with Tenant's construction of the Initial Alterations or any
subsequent Alterations.

        Tenant shall not do or suffer or permit anything to be done in or about
the Premises or the Real Property, nor bring or keep anything therein, which
would in any way subject Landlord, Landlord's agents or the holder of any
Superior Interest (as defined in Paragraph 21) to any liability, increase the
premium rate of or affect any fire, casualty, liability, rent or other insurance
relating to the Real Property or any of the contents of the Building, or cause a
cancellation of, or give rise to any defense by the insurer to any claim under,
or conflict with, any policies for such insurance. If any act or omission of
Tenant results in any such increase in premium rates, Tenant shall pay to
Landlord upon demand the amount of such increase. Tenant shall not do or suffer
or permit anything to be done in or about the Premises or the Real Property
which will in any way unreasonably obstruct or interfere with the rights of
other tenants or occupants of the Building or injure or annoy them, or use or
suffer or permit the Premises to be used for any immoral or unlawful purpose,
nor shall Tenant cause, maintain, suffer or permit any nuisance in, on or about
the Premises or the Real Property. Without limiting the foregoing, no
loudspeakers or other similar device which can be heard outside the Premises
shall, without the prior written approval of Landlord, be used in or about the
Premises. Tenant shall not commit or suffer to be committed any waste in, to or
about the Premises.

        Tenant agrees not to employ any person, entity or contractor for any
work in the Premises (including moving Tenant's equipment and furnishings in,
out or around the Premises) whose presence is likely to give rise to a labor or
other disturbance in the Building and, if necessary to prevent such a
disturbance in a particular situation, Landlord may require Tenant to employ
union labor for the work. Landlord will advise Tenant, upon request, as to
whether a given person, entity or contractor, in Landlord's reasonable judgment,
is likely to cause a labor or other disturbance.

               b. Compliance with Law. Tenant shall not do or permit anything to
be done in or about the Premises which will in any way conflict with any Legal
Requirement (as defined in Paragraph 7.a.(16) above) now in force or which may
hereafter be enacted. Tenant, at its sole cost and expense, shall promptly
comply with all such present and future Legal Requirements relating to the
condition, use or occupancy of the Premises, and shall perform all work to the
Premises or other portions of the Real Property required to effect such
compliance (or, as to work to the Base Building (as defined below) or outside of
the Premises, Landlord, at Landlord's election, may perform such work at
Tenant's cost). Notwithstanding the foregoing, however, (I) Tenant shall not be
required to perform any changes to the Base Building unless such changes are
related to or affected or triggered by (i) Tenant's Alterations (as defined in
Paragraph 9 below), other than


                                       9
<PAGE>

the Initial Alterations (which are addressed in clause (II) below), (ii)
Tenant's particular use of the Premises (as opposed to Tenant's use of the
Premises for general office purposes in a normal and customary manner), or (iii)
Tenant's particular employees or employment practices, and (II) Tenant shall not
be required to perform any changes to portions of the Building systems located
outside of the Premises, or to other components of the Base Building located
outside of the Premises, by reason of the Initial Alterations unless such
changes are related to or affected or triggered by (i) Tenant's failure to
design and construct the Initial Alterations in compliance with applicable
building codes and other Legal Requirements, or (ii) inclusion in the Initial
Alterations of improvements which are not normal and customary general office
improvements (such as, without limitation, library, file, computer or meeting
rooms, classroom facilities or kitchens or cafeterias or other areas requiring
floor reinforcement or enhanced systems requirements). Upon Tenant's request
with its submission to Landlord of the plans and specifications for the Initial
Alterations, Landlord will advise Tenant if any of the Initial Alterations are
within the preceding clause (ii). The judgment of any court of competent
jurisdiction or the admission of Tenant in an action against Tenant, whether or
not Landlord is a party thereto, that Tenant has violated any Legal Requirement
shall be conclusive of that fact as between Landlord and Tenant. Tenant shall
immediately furnish Landlord with any notices received from any insurance
company or governmental agency or inspection bureau regarding any unsafe or
unlawful conditions within the Premises or the violation of any Legal
Requirement. In no event shall Tenant's compliance obligations hereunder include
any work required of Landlord as Landlord's Work pursuant to Paragraph 4.c.
above.

               "Base Building" means the structural portions of the Building
(including exterior walls, roof, foundation, floor slabs and core of the
Building), all Building systems, including, without limitation, elevator,
plumbing, heating, electrical, security, life safety and power, except (i) those
special or supplemental systems (including air-conditioning systems), and
equipment used in connection therewith , and non-Building standard lighting and
electrical wiring installed specifically for Tenant or any other tenants and
(ii) the portion of any Building system within the Premises or any other
specific tenant space, the maintenance, repair or compliance of which is the
responsibility of Tenant or such other tenant, respectively.

               c. Hazardous Materials. Tenant shall not cause or permit the
storage, use, generation, release, handling or disposal (collectively,
"Handling") of any Hazardous Materials (as defined below), in, on, or about the
Premises or the Real Property by Tenant or any agents, employees, contractors,
licensees, subtenants, customers, guests or invitees of Tenant (collectively
with Tenant, "Tenant Parties"), except that Tenant shall be permitted to use
normal quantities of office supplies or products (such as copier fluids or
cleaning supplies) customarily used in the conduct of general business office
activities ("Common Office Chemicals"), provided that the Handling of such
Common Office Chemicals shall comply at all times with all Legal Requirements,
including Hazardous Materials Laws (as defined below). Notwithstanding anything
to the contrary contained herein, however, in no event shall Tenant permit any
usage of Common Office Chemicals in a manner that may cause the Premises or the
Real Property to be contaminated by any Hazardous Materials or in violation of
any Hazardous Materials Laws. After obtaining knowledge thereof, Tenant shall
immediately advise Landlord in writing of (a) any and all enforcement, cleanup,
remedial, removal, or other governmental or regulatory actions instituted,
completed, or threatened pursuant to any Hazardous Materials Laws relating to
any Hazardous Materials affecting the Premises; and (b) all claims made or
threatened by any third party against Tenant, Landlord, the Premises or the Real
Property relating to damage, contribution, cost recovery, compensation, loss, or
injury resulting from any Hazardous Materials on or about the Premises. Without
Landlord's prior written consent, Tenant shall not take any remedial action or
enter into any agreements or settlements in response to the presence of any
Hazardous Materials in, on, or about the Premises. Tenant shall be solely
responsible for and shall indemnify, defend and hold Landlord and all other
Indemnitees (as defined in Paragraph 14.b. below), harmless from and against all
Claims (as defined in Paragraph 14.b. below), arising out of or in connection
with, or otherwise relating to (i) any Handling of Hazardous Materials by any
Tenant Party or Tenant's breach of its obligations hereunder, or (ii) any
removal, cleanup, or restoration work and materials necessary to return the Real
Property or any other property of whatever nature located on the Real Property
to their condition existing prior to the Handling of Hazardous Materials in, on
or about the Premises by Tenant or any Tenant Party. Tenant's obligations under
this paragraph shall survive the expiration or other termination of this Lease.
For purposes of this Lease, "Hazardous Materials" means any explosive,
radioactive materials, hazardous wastes, or hazardous substances, including
without limitation asbestos containing materials, PCB's, CFC's, or substances
defined as "hazardous substances" in the Comprehensive Environmental Response,
Compensation and Liability Act of 1980, as amended, 42 U.S.C. Section 9601-9657;
the Hazardous Materials Transportation Act of 1975, 49 U.S.C. Section 1801-1812;
the Resource Conservation and Recovery Act of 1976, 42 U.S.C. Section 6901-
6987; or any other Legal Requirement regulating, relating to, or imposing
liability or standards of conduct concerning any such materials or substances
now or at any time hereafter in effect (collectively, "Hazardous Materials
Laws").

               d. Applicability of Paragraph. The provisions of this Paragraph 8
are for the benefit of Landlord, the holder of any Superior Interest (as defined
in Paragraph 21 below), and the other Indemnitees only and are not nor shall
they be construed to be for the benefit of any tenant or occupant of the
Building.

        9. Alterations and Restoration.


                                       10
<PAGE>

               a. Tenant shall not make or permit to be made any alterations,
modifications, additions, decorations or improvements to the Premises, or any
other work whatsoever that would directly or indirectly involve the penetration
or removal (whether permanent or temporary) of, or require access through, in,
under, or above any floor, wall or ceiling, or surface or covering thereof in
the Premises (collectively, "Alterations"), except as expressly provided in this
Paragraph 9. If Tenant desires any Alteration, except for Cosmetic Alterations
as described in the next paragraph, Tenant must obtain Landlord's prior written
approval of such Alteration, which approval shall not be unreasonably withheld
or delayed, provided, however, that Landlord shall have at least ten (10)
Business Days from Landlord's receipt of Final Plans (as defined below) for any
Alterations in which to grant or reasonably withhold its approval of such
Alterations. "Final Plans" means working plans and specifications (the "Working
Drawings") for all of the work and improvements which Tenant desires to be
included within the Alterations (including any related Alterations), and which
show work and improvements that comply with all applicable Legal Requirements
and the Building Construction Standards (as defined below), and shall be in
sufficient detail as to enable the general contractor for the work to obtain all
necessary governmental permits for construction of all of the Alterations
(including any related Alterations) and to secure complete bids from qualified
contractors to perform the work for all of the Alterations (including any
related Alterations). In the case of the Initial Alterations, the aforesaid ten
(10) Business Day period shall commence on the later of the date of this Lease
or Landlord's receipt of the Final Plans for the Initial Alterations.
Notwithstanding the foregoing, Tenant may submit the Final Plans for the Initial
Alterations in logical stages or trade groupings, in which case the aforesaid
ten (10) Business Day period shall apply to the plans and specifications for
each such stage or grouping after submission thereof; provided, however, that
Landlord reserves the right to modify its approval, conditions or requirements
with respect to the plans and specifications for any such prior stage or
grouping to the extent made necessary by the requirements of the plans and
specifications for any subsequently submitted stage or grouping.

        Notwithstanding the foregoing or anything to the contrary contained
elsewhere in this Paragraph 9, Tenant shall have the right, without Landlord's
consent, to make any Alteration to the Premises that meets all of the following
criteria (a "Cosmetic Alteration"): (a) the Alteration is decorative in nature
(such as paint, carpet or other wall or floor finishes, movable partitions or
other such work), (b) Tenant provides Landlord with ten (10) days' advance
written notice of the commencement of such Alteration, (c) such Alteration does
not affect the Building's electrical, mechanical, life safety, plumbing,
security, or HVAC systems or any other portion of the Base Building or any part
of the Building other than the Premises, (d) the work will not decrease the
value of the Premises, does not require a building permit or other governmental
permit, uses only new materials comparable in quality to those being replaced
and is performed in a workman-like manner and in accordance with all Legal
Requirements, and (e) the cost of such Alteration, when aggregated with the cost
of all other Cosmetic Alterations performed during the previous twelve (12)
month period, does not exceed Sixty-Five Thousand Dollars ($65,000.00) in the
aggregate as to all of the Premises. At the time Tenant notifies Landlord of any
Cosmetic Alteration, Tenant shall give Landlord a copy of Tenant's plans for the
work. If the Cosmetic Alteration is of such a nature that formal plans will not
be prepared for the work, Tenant shall provide Landlord with a reasonably
specific description of the work.

        All Alterations shall be made at Tenant's sole cost and expense,
including the expense of complying with all present and future Legal
Requirements, and the expense of any other work required to be performed in
other areas within or outside the Premises by reason of the Alterations;
provided, however, that as to the Initial Alterations Tenant's duty to perform
compliance work outside of the Premises shall be subject to clause (II) of
Paragraph 8.b. Alterations shall be made, at Tenant's election, by Landlord's
contractor or by a contractor reasonably approved by Landlord. If Tenant, in its
sole discretion, hires Landlord's contractor to perform the Alterations
(including, without limitation, the Initial Alterations), Landlord's contractor
shall be entitled to receive a fee for such work of fifteen percent (15%) of the
first $100,000 of the construction costs of such work, and the fee for any
construction costs over such amount shall be as negotiated by Tenant and
Landlord's contractor. If Landlord's contractor does not perform the Alterations
pursuant to the above, Tenant shall pay Landlord on demand prior to or during
the course of such construction an amount (the "Alteration Operations Fee")
equal to five percent (5%) of the total cost of the Alterations (and for
purposes of calculating the Alteration Operations Fee, such cost shall include
architectural and engineering fees, but shall not include permit fees) as
compensation to Landlord for electrical energy consumed in connection with the
work, freight elevator operation, additional cleaning expenses, additional
security services, review of plans and specifications, and for other
miscellaneous costs incurred by Landlord as result of the work. Notwithstanding
the foregoing, (i) the Alteration Operations Fee shall not be due with respect
to Cosmetic Alterations, and in lieu thereof Tenant shall reimburse Landlord
within thirty (30) days after Landlord's demand for the actual and reasonable
fees paid by Landlord to third party architects, engineers or other consultants
retained by Landlord to review the Cosmetic Alterations and confirm that they
qualify as such, and (ii) the Alteration Operations Fee with respect to the
Initial Alterations shall be an amount equal to Sixty-Three Thousand Four
Hundred Sixty-Seven Dollars ($63,467.00).

        All such work shall be performed diligently and in a first-class
workmanlike manner and in accordance with plans and specifications reasonably
approved by Landlord, and shall comply with all Legal Requirements and
Landlord's reasonable construction procedures and requirements for the Building,
as in effect from time to time (including Landlord's reasonable requirements
relating to insurance and contractor qualifications) (the "Building Construction
Standards"). In no event shall Tenant employ any person, entity


                                       11
<PAGE>

or contractor to perform work in the Premises whose presence may give rise to a
labor or other disturbance in the Building. Default by Tenant in the payment of
any sums agreed to be paid by Tenant for or in connection with an Alteration
(regardless of whether such agreement is pursuant to this Paragraph 9 or
separate instrument) shall entitle Landlord to all the same remedies as for
non-payment of rent hereunder, subject to the expiration of any applicable
notice and cure period under Paragraph 25.a. below. Any Alterations, including,
without limitation, moveable partitions that are affixed to the Premises (but
excluding moveable, free standing partitions) and all carpeting, shall at once
become part of the Building and the property of Landlord. Tenant shall give
Landlord not less than five (5) days prior written notice of the date the
construction of the Alteration is to commence. Landlord may post and record an
appropriate notice of nonresponsibility with respect to any Alteration and
Tenant shall maintain any such notices posted by Landlord in or on the Premises.

               b. Upon Tenant's written request expressly referring to this
Paragraph 9.b., Landlord shall advise Tenant at the time of Landlord's approval
of any Alteration requested by Tenant or, if pursuant to Paragraph 9.a.
Landlord's approval is not required, within five (5) Business Days after such
written request by Tenant, whether Landlord will require the removal of the
Alteration and restoration of the Premises to its previous condition at the
expiration or sooner termination of this Lease. Those Alterations so required by
Landlord to be removed from the Premises at the expiration or sooner termination
of this Lease shall be so removed by Tenant and the Premises shall be restored
by Tenant to their condition prior to the making of the Alterations, ordinary
wear and tear excepted. If Tenant fails to request such determination by
Landlord as set forth above, then at Landlord's sole election exercised at the
expiration or sooner termination of this Lease any or all such Alterations shall
be removed and the Premises so restored. If Tenant requests such determination
by Landlord as set forth above, and Landlord fails to timely respond thereto,
Landlord shall be deemed to have exercised its right to require that Tenant
remove such Alterations at the expiration or sooner termination of this Lease
and restore the Premises as set forth above. Notwithstanding the foregoing,
Tenant shall not be obligated to remove from the Premises any of the Initial
Alterations which are normal and customary general office improvements. The
removal of the Alterations and the restoration of the Premises shall be
performed by a general contractor selected by Tenant and reasonably approved by
Landlord, in which event Tenant shall pay the general contractor's fees and
costs in connection with such work. Any separate work letter or other agreement
which is hereafter entered into between Landlord and Tenant pertaining to
Alterations shall be deemed to automatically incorporate the terms of this Lease
without the necessity for further reference thereto.

        10. Repair.

               a. By taking possession of the Premises, Tenant agrees that the
Premises are in good condition and repair, but the foregoing shall not relieve
Landlord from its obligation to perform Landlord's Work as required by Paragraph
4.c. above, or from its repair obligations pursuant to Paragraphs 10.b. and 26
below. Tenant, at Tenant's sole cost and expense, shall keep the Premises and
every part thereof (including the interior walls and ceilings of the Premises,
those portions of the Building systems located within and exclusively serving
the Premises, and improvements and Alterations) in good condition and repair,
ordinary wear and tear excepted. Tenant waives all rights to make repairs at the
expense of Landlord as provided by any Legal Requirement now or hereafter in
effect. It is specifically understood and agreed that, except as specifically
set forth in this Lease, Landlord has no obligation and has made no promises to
alter, remodel, improve, repair, decorate or paint the Premises or any part
thereof, and that no representations respecting the condition of the Premises or
the Building have been made by Landlord to Tenant. Tenant hereby waives the
provisions of California Civil Code Sections 1932(1), 1941 and 1942 and of any
similar Legal Requirement now or hereafter in effect.

               b. Landlord shall repair and maintain in good condition and
repair the Base Building (other than the portions of Building systems that are
Tenant's responsibility to maintain and repair pursuant to Paragraph 10.a.
above) and common areas of the Real Property; provided, however, that to the
extent repairs which Landlord is required to make pursuant to this Paragraph
10.b. are necessitated by the negligence or willful misconduct of Tenant or
Tenant's agents, employees or contractors, then Tenant shall reimburse Landlord
for the cost of such repair within thirty (30) days after Landlord's demand to
the extent Landlord is not reimbursed therefor by insurance (assuming for such
purpose that Landlord carries the insurance it is required to carry pursuant to
Paragraph 15.d. below). Landlord shall in no event be obligated to repair any
ordinary wear and tear to the Premises. Landlord shall repair and maintain the
Real Property in accordance with the foregoing provisions to the standards of
other first-class high-rise office buildings in the San Francisco financial
district.

        11. Abandonment. Tenant shall not abandon (within the meaning of
California Civil Code Section 1951.2) the Premises or any part thereof at any
time during the term hereof. Tenant understands that if Tenant so abandons the
Premises, the risk of fire, other casualty and vandalism to the Premises and the
Building will be increased. Accordingly, such action by Tenant shall constitute
an Event of Default hereunder. Upon the expiration or earlier termination of
this Lease, or if Tenant abandons or surrenders all or any part of the Premises
or is dispossessed of the Premises by process of law, or otherwise, any movable
furniture, equipment, trade fixtures, or other personal property belonging to
Tenant and left on the Premises shall at the option of Landlord be deemed to be
abandoned and, whether or not the property is deemed


                                       12
<PAGE>

abandoned, Landlord shall have the right to remove such property from the
Premises and charge Tenant for the removal and any restoration of the Premises
as provided in Paragraph 9. Landlord may charge Tenant for the storage of
Tenant's property left on the Premises at such rates as Landlord may from time
to time reasonably determine, or, Landlord may, at its option, store Tenant's
property in a public warehouse at Tenant's expense. Notwithstanding the
foregoing, neither the provisions of this Paragraph 11 nor any other provision
of this Lease shall impose upon Landlord any obligation to care for or preserve
any of Tenant's property left upon the Premises, and Tenant hereby waives and
releases Landlord from any claim or liability in connection with the removal of
such property from the Premises and the storage thereof and specifically waives
the provisions of California Civil Code Section 1542 with respect to such
release. Landlord's action or inaction with regard to the provisions of this
Paragraph 11 shall not be construed as a waiver of Landlord's right to require
Tenant to remove its property, restore any damage to the Premises and the
Building caused by such removal, and make any restoration required pursuant to
Paragraph 9 above.

        12. Liens. Tenant shall not permit any mechanic's, materialman's or
other liens arising out of work performed at the Premises by or on behalf of
Tenant to be filed against the fee of the Real Property nor against Tenant's
interest in the Premises. Landlord shall have the right to post and keep posted
on the Premises any notices which it deems necessary for protection from such
liens. If any such liens are filed, Landlord may, upon twenty (20) days' written
notice to Tenant, without waiving its rights based on such breach by Tenant and
without releasing Tenant from any obligations hereunder, pay and satisfy the
same and in such event the sums so paid by Landlord shall be due and payable by
Tenant immediately without notice or demand, with interest from the date paid by
Landlord through the date Tenant pays Landlord, at the Interest Rate. Tenant
agrees to indemnify, defend and hold Landlord and the other Indemnitees (as
defined in Paragraph 14.b. below) harmless from and against any Claims (as
defined in Paragraph 14.b. below) for mechanics', materialmen's or other liens
in connection with any Alterations, repairs or any work performed, materials
furnished or obligations incurred by or for Tenant, other than Claims due to
Landlord's failure to disburse Landlord's Allowance in accordance with the
requirements of Paragraph 4.b. above.

        13. Assignment and Subletting.

               a. Landlord's Consent. Landlord's and Tenant's agreement with
regard to Tenant's right to transfer all or part of its interest in the Premises
is as expressly set forth in this Paragraph 13. Tenant agrees that, except upon
Landlord's prior written consent, which consent shall not (subject to Landlord's
rights under Paragraph 13.d. below) be unreasonably withheld, neither this Lease
nor all or any part of the leasehold interest created hereby shall, directly or
indirectly, voluntarily or involuntarily, by operation of law or otherwise, be
assigned, mortgaged, pledged, encumbered or otherwise transferred by Tenant or
Tenant's legal representatives or successors in interest (collectively an
"assignment") and neither the Premises nor any part thereof shall be sublet or
be used or occupied for any purpose by anyone other than Tenant (collectively, a
"sublease"). Except where Landlord's consent is expressly not required
hereunder, any assignment or subletting without Landlord's prior written consent
shall, at Landlord's option, be void and shall constitute an Event of Default
entitling Landlord to exercise all remedies available to Landlord under this
Lease and at law.

        The parties hereto agree and acknowledge that, among other circumstances
for which Landlord may reasonably withhold its consent to an assignment or
sublease, it shall be reasonable for Landlord to withhold its consent where: (i)
the assignment or subletting would increase the operating costs for the Building
or the burden on the Building services, or generate additional foot traffic,
elevator usage or security concerns in the Building, or create an increased
probability of the comfort and/or safety of Landlord and other tenants in the
Building being compromised or reduced, (ii) the space will be used for a school
or training facility, an entertainment, sports or recreation facility, retail
sales to the public (unless Tenant's permitted use is retail sales), a personnel
or employment agency (other than executive offices of the same not having
substantial dealings with the public), an office or facility of any governmental
or quasi-governmental agency or authority having any on-premises dealings with
the general public, a place of public assembly (including without limitation a
meeting center, theater or public forum), any use by or affiliation with a
foreign government (including without limitation an embassy or consulate or
similar office), or a facility for the provision of social, welfare or clinical
health services or sleeping accommodations (whether temporary, daytime or
overnight); (iii) the proposed assignee or subtenant is a current tenant of the
Building, or is a prospective tenant of the Building with whom Landlord has
entered into a letter of intent (or similar document) or exchanged an offer and
counteroffer, and in either such case, Landlord has or will have, in the
applicable delivery period, available space in the Building that is comparable
to the Premises or the portion thereof subject to such subletting, as
applicable, or that otherwise meets such tenant's or prospective tenant's needs
(including delivery schedule); (iv) Landlord reasonably disapproves of the
proposed assignee or subtenant's reputation or creditworthiness; (v) Landlord
reasonably determines that the character of the business that would be conducted
by the proposed assignee or subtenant at the Premises, or the manner of
conducting such business, would be inconsistent with the character of the
Building as a first-class office building; (vi) the assignment or subletting may
conflict with any exclusive uses granted to other tenants of the Real Property,
or with the terms of any easement, covenant, condition or restriction, or other
agreement affecting the Real Property; (vii) the assignment or subletting would
involve a change in use from that expressly permitted under this Lease; or
(viii) Landlord reasonably determines that there is a material risk that the
proposed assignee may be unable to perform all of Tenant's obligations under
this Lease or the proposed


                                       13
<PAGE>

subtenant may be unable to perform all of its obligations under the proposed
sublease. Landlord's foregoing rights and options shall continue throughout the
entire term of this Lease.

        For purposes of this Paragraph 13, the following events shall be deemed
an assignment or sublease, as appropriate: (i) the issuance of equity interests
(whether stock, partnership interests or otherwise) in Tenant or any subtenant
or assignee, or any entity controlling any of them, to any person or group of
related persons, in a single transaction or a series of related or unrelated
transactions, such that, following such issuance, such person or group shall
have Control (as defined below) of Tenant or any subtenant or assignee; (ii) a
transfer of Control of Tenant or any subtenant or assignee, or any entity
controlling any of them, in a single transaction or a series of related or
unrelated transactions (including, without limitation, by consolidation, merger,
acquisition or reorganization), except that the transfer of outstanding capital
stock or other listed equity interests by persons or parties other than
"insiders" within the meaning of the Securities Exchange Act of 1934, as
amended, through the "over-the-counter" market or any recognized national or
international securities exchange, shall not be included in determining whether
Control has been transferred; (iii) a reduction of Tenant's assets to the point
that this Lease is substantially Tenant's only asset; or (iv) a change or
conversion in the form of entity of Tenant, any subtenant or assignee, or any
entity controlling any of them, which has the effect of limiting the liability
of any of the partners, members or other owners of such entity. "Control" shall
mean direct or indirect ownership of 50% or more of all of the voting stock of a
corporation or 50% or more of the legal or equitable interest in any other
business entity, or the power to direct the operations of any entity (by equity
ownership, contract or otherwise).

        If this Lease is assigned, whether or not in violation of the terms of
this Lease, Landlord may collect rent from the assignee. If the Premises or any
part thereof is sublet, Landlord may, upon an Event of Default by Tenant
hereunder, collect rent from the subtenant. In either event, Landlord may apply
the amount collected from the assignee or subtenant to Tenant's monetary
obligations hereunder.

        The consent by Landlord to an assignment or subletting hereunder shall
not relieve Tenant or any assignee or subtenant from obtaining Landlord's
express prior written consent to any other or further assignment or subletting.
Neither an assignment or subletting nor the collection of rent by Landlord from
any person other than Tenant, nor the application of any such rent as provided
in this Paragraph 13.a. shall be deemed a waiver of any of the provisions of
this Paragraph 13.a. or release Tenant from its obligation to comply with the
provisions of this Lease and Tenant shall remain fully and primarily liable for
all of Tenant's obligations under this Lease.

               b. Processing Expenses. Tenant shall pay to Landlord, as
Landlord's cost of processing each proposed assignment or subletting for which
Landlord's consent is required hereunder, an amount equal to the sum of (i)
Landlord's reasonable attorneys' and other professional fees, plus (ii) the sum
of $750.00 for the cost of Landlord's administrative, accounting and clerical
time (collectively, "Processing Costs"), and the amount of all direct and
indirect costs and expenses incurred by Landlord arising from the assignee or
sublessee moving into the subject space (including, without limitation, costs of
freight elevator operation for moving of furnishings and trade fixtures,
security service, janitorial and cleaning service, and rubbish removal service).
Notwithstanding anything to the contrary herein, Landlord shall not be required
to process any request for Landlord's consent to an assignment or subletting
until Tenant has paid to Landlord the amount of Landlord's estimate of the
Processing Costs and all other direct and indirect costs and expenses of
Landlord and its agents arising from the assignee or subtenant taking occupancy.

               c. Consideration to Landlord. In the event of any assignment or
sublease, except with respect to an assignment or sublease pursuant to Paragraph
13.g., Landlord shall be entitled to receive, as additional rent hereunder,
fifty percent (50%) of any consideration (including, without limitation, payment
for leasehold improvements and any "Leasehold Profit" as defined below) paid by
the assignee or subtenant for the assignment or sublease and, in the case of a
sublease, fifty percent (50%) of the excess of the amount of rent paid for the
sublet space by the subtenant over the amount of Monthly Rent under Paragraph 5
above and Additional Rent under Paragraph 7 above attributable to the sublet
space for the corresponding month; except that Tenant may recapture, on an
amortized basis over the term of the sublease or assignment, together with
interest on the unamortized balance at a rate per annum equal to three (3)
percentage points over the Treasury Rate charged as of the commencement date of
such assignment or sublease (i) any brokerage commissions paid by Tenant in
connection with the subletting or assignment (not to exceed commissions
typically paid in the market at the time of such subletting or assignment), (ii)
reasonable legal fees paid by Tenant in connection with such assignment or
subletting (provided that such legal fees shall not exceed One Thousand Five
Hundred Dollars ($1,500.00) for an assignment of the Lease and shall not exceed
Seven Hundred Fifty Dollars ($750.00) for any single sublease) and (iii) any
improvement allowance or construction costs incurred by Tenant in connection
with the assignment or sublease (collectively the "Assignment or Subletting
Costs"), provided that, as a condition to Tenant recapturing the Assignment or
Subletting Costs, Tenant shall provide to Landlord, within ninety (90) days of
Landlord's execution of Landlord's consent to the assignment or subletting, a
detailed accounting of the Assignment or Subletting Costs theretofore incurred
by Tenant and supporting documents, such as receipts and construction invoices,
and within one-hundred eighty (180) days of Landlord's execution of Landlord's
consent to the assignment or subletting, a detailed accounting of all Assignment
or Subletting Costs to be taken into account hereunder and supporting documents,
such as receipts and construction invoices. To effect the foregoing, Tenant
shall deduct from the


                                       14
<PAGE>

monthly amounts received by Tenant from the subtenant or assignee as rent or
Fconsideration (i) the Monthly Rent and Additional Rent payable by Tenant to
Landlord for the subject space and (ii) the incremental amount, on an amortized
basis, of the Assignment or Subletting Costs, and fifty percent (50%) of the
then remaining sum shall be paid promptly to Landlord. "Leasehold Profit" shall
be the value allocated to the leasehold between the parties to the assignment or
sublease, but in no event less than the excess of the present value of the fair
market rent of the Premises for the remaining term of this Lease after such
assignment or sublease, over the present value of the Monthly Rent payable
hereunder for such remaining term, as reasonably determined by Landlord. Upon
Landlord's request, Tenant shall assign to Landlord all amounts to be paid to
Tenant by any such subtenant or assignee and that belong to Landlord, and shall
direct such subtenant or assignee to pay the same directly to Landlord. If there
is more than one sublease under this Lease, the amounts (if any) to be paid by
Tenant to Landlord pursuant to the preceding sentence shall be separately
calculated for each sublease and amounts due Landlord with regard to any one
sublease may not be offset against rental and other consideration pertaining to
or due under any other sublease.

               d. Procedures. If Tenant desires to assign this Lease or any
interest therein or sublet all or part of the Premises, Tenant shall give
Landlord written notice thereof and the terms proposed (the "Sublease Notice"),
which Sublease Notice, in the case of a proposed sublease, shall designate the
space proposed to be sublet. Landlord shall have the prior right and option (to
be exercised by written notice to Tenant given within thirty (30) days after
receipt of Tenant's notice) (i) to sublet from Tenant the portion of the
Premises proposed by Tenant to be sublet, for the term for which such portion is
proposed to be sublet, but at the lesser of the proposed sublease rent or the
same rent (including Additional Rent as provided for in Paragraph 7 above) as
Tenant is required to pay to Landlord under this Lease for the same space,
computed on a pro rata square footage basis, and during the term of such
sublease Tenant shall be released of its obligations under this Lease with
regard to the subject space, provided, however, that if the portion of the
Premises proposed by Tenant to be sublet consists of space on more than one
floor of the Building, Landlord may exercise (or not exercise) its sublet option
under this clause (i) separately as to the proposed sublet space on each such
floor, (ii) in the case of any proposed assignment of this Lease or any proposed
sublet of all or any portion of the Premises the term of which is greater than
five (5) years or expires during the last fifteen (15) months of the term of
this Lease, to terminate this Lease in its entirety (in the case of any proposed
assignment) or as it pertains to the portion of the Premises so proposed by
Tenant to be sublet (in the case of any such proposed sublet), provided,
however, that if the portion of the Premises proposed by Tenant to be sublet
consists of space on more than one floor of the Building, Landlord may exercise
(or not exercise) its termination option under this clause (ii) separately as to
the proposed sublet space on each such floor, or (iii) to approve Tenant's
proposal to assign or sublet conditional upon Landlord's subsequent written
approval of the specific assignment or sublease obtained by Tenant and the
specific assignee or subtenant named therein. If Landlord exercises its option
in (i) above, then Landlord may, at Landlord's sole cost, construct improvements
in the subject space and, so long as the improvements are suitable for general
office purposes, Landlord shall have no obligation to restore the subject space
to its original condition following the termination of the sublease. If Landlord
exercises its option described in (iii) above, then Tenant shall have six (6)
months thereafter to submit to Landlord, for Landlord's written approval,
Tenant's proposed assignment or sublease agreement (in which the proposed
assignee or subtenant shall be named, and which agreement shall otherwise meet
the requirements of Paragraph 13.e. below), together with a current financial
statement of such proposed assignee or subtenant and any other information
reasonably requested by Landlord. If Tenant fails to submit the specific
assignment or sublease and other required information within such time, or if
the terms of the specific assignment or sublease submitted by Tenant vary from
the terms set forth in the Sublease Notice approved by Landlord pursuant to
(iii) above, then Tenant shall be required to submit a new Sublease Notice for
Landlord's evaluation pursuant to the procedures set forth in this paragraph. If
Landlord fails to exercise any such option to sublet or to terminate, this shall
not be construed as or constitute a waiver of any of the provisions of
Paragraphs 13.a., b., c. or d. herein. If Landlord exercises any option to
sublet or to terminate, any costs of demising the portion of the Premises
affected by such subleasing or termination shall be borne by Tenant. In
addition, Landlord shall have no liability for any real estate brokerage
commission(s) or with respect to any of the costs and expenses that Tenant may
have incurred in connection with its proposed assignment or subletting, and
Tenant agrees to indemnify, defend and hold Landlord and all other Indemnitees
harmless from and against any and all Claims (as defined in Paragraph 14.b.
below), including, without limitation, claims for commissions arising from such
proposed assignment or subletting. Landlord's foregoing rights and options shall
continue throughout the entire term of this Lease.

               e. Documentation. No permitted assignment or subletting by Tenant
shall be effective until there has been delivered to Landlord a fully executed
counterpart of the assignment or sublease which expressly provides that (i) the
assignee or subtenant may not further assign or sublet the assigned or sublet
space without Landlord's prior written consent (which, in the case of a further
assignment proposed by an assignee, shall not be unreasonably withheld, subject
to Landlord's rights under the provisions of this Paragraph 13), subject,
however, to an assignee's right to further assign this Lease without Landlord's
consent pursuant to Paragraph 13.g. below, (ii) the assignee or subtenant will
comply with all of the provisions of this Lease applicable to the Premises (or,
in the case of a sublease, applicable to the portion of the Premises covered by
such sublease), and Landlord may enforce the Lease provisions directly against
such assignee or subtenant (except that, in the case of a sublease, the
subtenant's liability for rent shall not exceed the rent set forth in the
sublease), (iii) in the case of an assignment, the assignee assumes all of
Tenant's obligations under this Lease arising on or after the date of the
assignment, and (iv) in the case of a sublease, the subtenant


                                       15
<PAGE>

agrees to be and remain jointly and severally liable with Tenant for the payment
of rent pertaining to the sublet space in the amount set forth in the sublease,
and for the performance of all of the terms and provisions of this Lease which
are applicable to the sublet space. In addition to the foregoing, no sublease by
Tenant shall be effective until there has been delivered to Landlord a fully
executed counterpart of Landlord's consent to sublease form. The failure or
refusal of a subtenant or assignee to execute any such instrument shall not
release or discharge the subtenant or assignee from its liability as set forth
above. Notwithstanding the foregoing, however, no subtenant or assignee shall be
permitted to occupy the Premises unless and until such subtenant or assignee
provides Landlord with certificates evidencing that such subtenant or assignee
is carrying all insurance coverage required of such subtenant or assignee under
this Lease.

               f. No Merger. Without limiting any of the provisions of this
Paragraph 13, if Tenant has entered into any subleases of any portion of the
Premises, the voluntary or other surrender of this Lease by Tenant, or a mutual
cancellation by Landlord and Tenant, shall not work a merger, and shall, at the
option of Landlord, terminate all or any existing subleases or subtenancies or,
at the option of Landlord, operate as an assignment to Landlord of any or all
such subleases or subtenancies. If Landlord does elect that such surrender or
cancellation operate as an assignment of such subleases or subtenancies,
Landlord shall in no way be liable for any previous act or omission by Tenant
under the subleases or for the return of any deposit(s) under the subleases that
have not been actually delivered to Landlord, nor shall Landlord be bound by any
sublease modification(s) executed without Landlord's consent or for any advance
rental payment by the subtenant in excess of one month's rent.

               g. Affiliates. Notwithstanding anything to the contrary in
Paragraphs 13.a. through 13.d., but subject to Paragraphs 13.e. and 13.f.,
Tenant may assign this Lease or sublet the Premises or any portion thereof,
without Landlord's consent, to any partnership, corporation or other entity
which controls, is controlled by, or is under common control with Tenant or
Tenant's parent (control being defined for such purposes as ownership of at
least 50% of the equity interests in, and the power to direct the management of,
the relevant entity) or to any partnership, corporation or other entity
resulting from a merger or consolidation with Tenant, or to any person or entity
which acquires substantially all the assets of Tenant (whether as a direct
purchase of such assets or a purchase of all or substantially all of Tenant's
stock, partnership or other equity interests) as a going concern (collectively,
an "Affiliate"), provided that (i) Landlord receives at least ten (10) days'
prior written notice of an assignment or subletting, (ii) the Affiliate's net
worth is not less than Tenant's net worth immediately prior to the assignment or
subletting, (iii) except in the case of an assignment by a merger or
consolidation where Tenant is not the surviving entity, or by the acquisition of
substantially all of Tenant's assets, the Affiliate has proven experience in the
operation of a first-class business of a type consistent with the use of the
Building as a first-class office Building in the San Francisco financial
district, (iv) except in the case of an assignment by a merger or consolidation
where Tenant is not the surviving entity, the Affiliate remains an Affiliate for
the duration of the subletting or the balance of the term in the event of an
assignment, (v) the Affiliate assumes (in the event of an assignment) in writing
all of Tenant's obligations under this Lease and agrees (in the event of a
sublease) that such subtenant will, at Landlord's election, attorn directly to
Landlord in the event that this Lease is terminated for any reason, (vi)
Landlord receives a fully executed copy of an assignment or sublease agreement
between Tenant and the Affiliate at least ten (10) days prior to the effective
date of such assignment or sublease, and (vii) in the case of an assignment, the
essential purpose of such assignment is to transfer an active, ongoing business
with substantial assets in addition to this Lease, and in the case of an
assignment or sublease the transaction is for legitimate business purposes
unrelated to this Lease and the transaction is not a subterfuge by Tenant to
avoid it obligations under this Lease or the restrictions on assignment and
subletting contained herein.

        14. Indemnification of Landlord.

               a. Landlord and the holders of any Superior Interests (as defined
in Paragraph 21 below) shall not be liable to Tenant and Tenant hereby waives
all claims against such parties for any loss, injury or other damage to person
or property in or about the Premises or the Real Property from any cause
whatsoever, including without limitation, water leakage of any character from
the roof, walls, basement, fire sprinklers, appliances, air conditioning,
plumbing or other portion of the Premises or the Real Property, or gas, fire,
explosion, falling plaster, steam, electricity, or any malfunction within the
Premises or the Real Property, or acts of other tenants of the Building;
provided, however, that the foregoing waiver shall be inapplicable to any loss,
injury or damage to the extent resulting from Landlord's gross negligence or
willful misconduct. Tenant acknowledges that from time to time throughout the
term of this Lease, construction work may be performed in and about the Building
and the Real Property by Landlord, contractors of Landlord, or other tenants or
their contractors, and that such construction work may result in noise and
disruption to Tenant's business. In addition to and without limiting the
foregoing waiver or any other provision of this Lease, Tenant agrees that
Landlord shall not be liable for, and Tenant expressly waives and releases
Landlord and the other Indemnitees (as defined in Paragraph 14.b. below) from
any Claims (as defined in Paragraph 14.b. below), including without limitation,
any and all Special Claims and Damages (as defined in Paragraph 28 below),
arising or alleged to be arising as a result of any such construction activity;
provided, however, that the foregoing waiver (other than as it applies to
Special Claims and Damages) shall be inapplicable to any loss, injury or damage
to the extent resulting from Landlord's gross negligence or willful misconduct.
Landlord shall use its good faith efforts to minimize such noise and disruption
to Tenant's business, and, without limitation, Landlord shall perform any
extraordinarily noisy or disruptive work after Business Hours


                                       16
<PAGE>

or on weekends to the extent such procedures would be generally followed by
managers of other first class high rise office buildings in the San Francisco
financial district (except to the extent an emergency and/or Legal Requirements
require otherwise, as reasonably determined by Landlord).

               b. Tenant shall hold Landlord and the holders of any Superior
Interest, and the constituent shareholders, partners or other owners thereof,
and all of their agents, contractors, servants, officers, directors, employees
and licensees (collectively with Landlord, the "Indemnitees") harmless from and
indemnify the Indemnitees against any and all claims, liabilities, damages,
costs and expenses, including reasonable attorneys' fees and costs incurred in
defending against the same (collectively, "Claims"), to the extent arising from
(a) the acts or omissions of Tenant or any other Tenant Parties (as defined in
Paragraph 8.c. above) in, on or about the Real Property, or (b) any construction
or other work undertaken by or on behalf of Tenant in, on or about the Premises,
whether prior to or during the term of this Lease (but excluding any
construction work undertaken by or on behalf of Landlord), or (c) any breach or
Event of Default under this Lease by Tenant, or (d) any accident, injury or
damage, howsoever and by whomsoever caused, to any person or property, occurring
in, on or about the Premises (including, without limitation, the balconies
contained within the Premises); except to the extent such Claims have been
released pursuant to Paragraph 16 below or such Clams are caused by the
negligence or willful misconduct of Landlord or its authorized representatives,
by Landlord's breach of its obligations under this Lease, or by the negligence
or willful misconduct of the Indemnitee seeking the benefit of the foregoing
indemnity. In case any action or proceeding be brought against any of the
Indemnitees by reason of any such Claim, Tenant, upon notice from Landlord,
covenants to resist and defend at Tenant's sole expense such action or
proceeding by counsel reasonably satisfactory to Landlord. The provisions of
this Paragraph 14.b. shall survive the expiration or earlier termination of this
Lease with respect to any injury, illness, death or damage occurring prior to
such expiration or termination.

        15. Insurance.

               a. Tenant's Insurance. Tenant shall, at Tenant's expense,
maintain during the term of this Lease (and, if Tenant occupies or conducts
activities in or about the Premises prior to or after the term hereof, then also
during such pre-term or post-term period): (i) commercial general liability
insurance including contractual liability coverage, with minimum coverages of
$1,000,000 per occurrence combined single limit for bodily injury and property
damage, $1,000,000 for products-completed operations coverage, $100,000 fire
legal liability, $1,000,000 for personal and advertising injury (which coverage
shall not be subject to the contractual liability exclusion), with a $2,000,000
general aggregate limit, for injuries to, or illness or death of, persons and
damage to property occurring in or about the Premises or otherwise resulting
from Tenant's operations in the Building, (ii) property insurance protecting
Tenant against loss or damage by fire and such other risks as are insurable
under then-available standard forms of "all risk" insurance policies (excluding
earthquake and flood but including water damage), covering Tenant's personal
property and trade fixtures in or about the Premises or the Real Property, and
any improvements and/or Alterations in the Premises, for the full replacement
value thereof without deduction for depreciation, except that Tenant shall not
be required to insure any of the Initial Alterations or subsequent Alterations
in the Premises which are normal and customary general office improvements;
(iii) workers' compensation insurance in statutory limits; (iv) at least three
months' coverage for loss of business income and continuing expenses, providing
protection against any peril included within the classification "all risk,"
excluding earthquake and flood but including water damage; and (v) if Tenant
operates owned, leased or non-owned vehicles on the Real Property, comprehensive
automobile liability insurance with a minimum coverage of $1,000,000 per
occurrence, combined single limit. The policies described above in clauses (i)
and (v) shall protect Tenant, as named insured, and Landlord and all the other
Indemnitees and any other parties designated by Landlord, as additional
insureds; shall insure Landlord's and such other parties' contingent liability
with regard to acts or omissions of Tenant; and shall specifically include all
liability assumed by Tenant under this Lease (provided, however, that such
contractual liability coverage shall not limit or be deemed to satisfy Tenant's
indemnity obligations under this Lease). The policies described in clause (ii)
above shall protect Tenant, as named insured, and Landlord and all the other
Indemnitees and any other parties designated by Landlord, as additional insureds
and as loss payees, as their respective interests may appear. If any of the
policies described above in this Paragraph 15.a. are subject to deductibles, the
deductible amounts (including by way of a self-insured retention) shall not be
in excess of those approved in advance in writing by Landlord in its reasonable
discretion. Landlord reserves the right to increase the foregoing amount of
liability coverage from time to time as Landlord reasonably determines is
required to adequately protect Landlord and the other parties designated by
Landlord from the matters insured thereby (provided, however, that Landlord
makes no representation that the limits of liability required hereunder from
time to time shall be adequate to protect Tenant), and to require that Tenant
cause any of its contractors, vendors, movers or other parties conducting
activities in or about or occupying the Premises to obtain and maintain
insurance as reasonably determined by Landlord and as to which Landlord and such
other parties reasonably designated by Landlord shall be additional insureds.

               b. Policy Form. Each insurance policy required pursuant to
Paragraph 15.a. above shall be issued by an insurance company licensed in the
State of California and with a general policyholders' rating of "A" or better
and a financial size ranking of "Class VIII" or higher in the most recent
edition of Best's Insurance Guide. Each insurance policy, other than Tenant's
workers' compensation insurance, shall


                                       17
<PAGE>

(i) provide that it may not be materially changed, cancelled or allowed to lapse
unless thirty (30) days' prior written notice to Landlord and any other insureds
designated by Landlord is first given, (ii) provide that no act or omission of
Tenant shall affect or limit the obligations of the insurer with respect to any
other insured, (iii) include all waiver of subrogation rights endorsements
necessary to effect the provisions of Paragraph 16 below, and (iv) provide that
the policy and the coverage provided shall be primary, that Landlord, although
an additional insured, shall nevertheless be entitled to recovery under such
policy for any damage to Landlord or the other Indemnitees by reason of acts or
omissions of Tenant, and that any coverage carried by Landlord shall be
noncontributory with respect to policies carried by Tenant. Each such insurance
policy or, if consistent with then current industry practice, a certificate
thereof, shall be delivered to Landlord by Tenant on or before the effective
date of such policy and thereafter Tenant shall deliver to Landlord renewal
policies or, if consistent with then current industry practice, renewal
certificates, at least thirty (30) days prior to the expiration dates of
expiring policies. If Tenant fails to procure such insurance or to deliver such
policies or certificates, and such failure shall continue for three (3) Business
Days after notice thereof from Landlord to Tenant, Landlord may, at its option,
procure the same for Tenant's account, and the cost thereof shall be paid to
Landlord by Tenant upon demand. Landlord may at any time, and from time to time,
inspect and/or copy any and all insurance policies required by this Lease.

               c. No Implication. Nothing in this Paragraph 15 shall be
construed as creating or implying the existence of (i) any ownership by Tenant
of any fixtures, additions, Alterations, or improvements in or to the Premises
or (ii) any right on Tenant's part to make any addition, Alteration or
improvement in or to the Premises.

               d. Landlord's Insurance. During the term hereof, Landlord shall
keep the Building and all Initial Alterations and subsequent Alterations in the
Premises made pursuant to Paragraph 4 hereof (but excluding any Initial
Alterations or subsequent Alterations which are not normal and customary general
office improvements, and also excluding any personal property, trade fixtures or
other fixtures, office equipment, furniture, artwork and other decorations in
any portion of the Premises not affixed to and a part of the Building) insured
through reputable insurance underwriters against perils covered by a standard
"all risk" insurance policy or policies as such policies are in use from time to
time for comparable first-class high-rise office buildings in the San Francisco
financial district (excluding, at Landlord's option, perils such as earthquake,
flood and other standard "all risk" policy form exclusions), with a deductible
provision, if any, that does not materially exceed that which prudent, efficient
operators of first-class high-rise office buildings in the San Francisco
financial district would carry from time-to-time in the exercise of reasonable
business judgment, in an amount or amounts equal to not less than eighty percent
(80%) of the full replacement value of the Building (excluding the land and the
footings, foundations and installations below the basement level) and such
Initial Alterations and subsequent Alterations (or such greater percentage as
shall be required to preclude Landlord from being deemed a coinsurer) , without
deduction for depreciation, including the costs of demolition and debris
removal, or such other fire and property damage insurance as Landlord shall
reasonably determine to give substantially equal or greater protection. During
the term hereof, Landlord shall keep in force general liability insurance in the
amount and coverage as Landlord deems commercially reasonable.

        16. Mutual Waiver of Subrogation Rights. Each party hereto hereby
releases the other respective party and, in the case of Tenant as the releasing
party, the other Indemnitees, and the respective partners, shareholders, agents,
employees, officers, directors and authorized representatives of such released
party, from any Claims such releasing party may have for damage to the Building,
the Premises or any of such releasing party's fixtures, personal property,
improvements and alterations in or about the Premises, the Building or the Real
Property that is caused by or results from risks insured against under any fire
and extended coverage insurance policies actually carried by such releasing
party or deemed to be carried by such releasing party; provided, however, that
such waiver shall be limited to the extent of the net insurance proceeds payable
by the relevant insurance company with respect to such loss or damage (or in the
case of deemed coverage, the net proceeds that would have been payable). For
purposes of this Paragraph 16, Landlord and Tenant shall be deemed to be
carrying the insurance policies that they are required to carry pursuant to
Paragraph 15 but do not actually carry. Each party hereto shall cause each such
fire and extended coverage insurance policy obtained by it to provide that the
insurance company waives all rights of recovery by way of subrogation against
the other respective party and the other released parties in connection with any
matter covered by such policy.

        17. Utilities.

               a. Basic Services. Landlord shall furnish the following utilities
and services ("Basic Services") for the Premises: (i) during the hours of 8 A.M.
to 6 P.M. ("Business Hours") Monday through Friday (except public holidays)
("Business Days"), electricity for Building standard lighting and power suitable
for the use of the Premises for ordinary general office purposes, (ii) during
Business Hours on Business Days, heat and air conditioning required in
Landlord's reasonable judgment for the comfortable use and occupancy of the
Premises for ordinary general office purposes, (iii) unheated water for the
restroom(s) and drinking fountain(s), if any, in the public areas serving the
Premises, (iv) elevator service to the floor(s) of the Premises by nonattended
automatic elevators for general office pedestrian usage, and (v) on Business
Days, janitorial services limited to emptying and removal of general office
refuse, light vacuuming as needed


                                       18
<PAGE>

and window washing as determined by Landlord. Notwithstanding the above, but
subject to any temporary shutdown for repairs, for security purposes, for
compliance with any Legal Requirements, or due to Force Majeure, (A) Tenant
shall have access to the Premises 24 hours a day, each day of the Lease term,
and (B) the services described in (iii) and (iv) above shall be provided to the
Premises 24 hours a day, each day of the Lease term, without additional charge
to Tenant. In addition, Tenant may use and Landlord shall make available to
Tenant water, heat, air conditioning, electric current, elevator and janitorial
service in excess of that provided in Basic Services ("Excess Services," which
shall include without limitation any power usage other than through existing
standard 110-volt AC outlets; electricity and/or water consumed by Tenant in
connection with any dedicated or supplemental heating, ventilating and/or air
conditioning, computer power, telecommunications and/or other special units or
systems of Tenant; chilled, heated or condenser water; or water used for any
purpose other than ordinary drinking and lavatory purposes), provided that the
Excess Services desired by Tenant are reasonably available to Landlord and to
the Premises (it being understood that in no event shall Landlord be obligated
to make available to the Premises more than the pro rata share of the capacity
of any Excess Service available to the Building or the applicable floor of the
Building, as the case may be), and provided further that Tenant complies with
the non-discriminatory procedures established by Landlord from time to time for
requesting and paying for such Excess Services and with all other provisions of
this Paragraph 17. Landlord reserves the right to install in the Premises or the
Real Property electric current and/or water meters (including, without
limitation, any additional wiring, conduit or panel required therefor) to
measure the electric current or water consumed by Tenant or to cause the usage
to be measured by other reasonable methods (e.g. by temporary "check" meters or
by survey). Subject to Tenant's payment for the same as an Excess Service,
Landlord agrees to make available to Tenant supplemental condenser water
sufficient to provide capacity for an additional thirty (30) tons of cooling for
Tenant's server room.

               b. Payment for Utilities and Services. The cost of Basic Services
shall be included in Operating Expenses. In addition, Tenant shall pay to
Landlord within thirty (30) days after Landlord's demand (i) the cost, at
Landlord's prevailing rate in the Building, of any Excess Services used by
Tenant, (ii) the cost of installing, operating, maintaining or repairing any
meter or other device used to measure Tenant's consumption of utilities, but
only if such meter or other device establishes Tenant's use of Excess Services,
(iii) the cost of installing, operating, maintaining or repairing any
Temperature Balance Equipment (as defined in Paragraph 17.c. below) for the
Premises and/or any equipment required in connection with any Excess Services
requested by Tenant, and (iv) any cost otherwise incurred by Landlord in keeping
account of or determining any Excess Services used by Tenant. Landlord's failure
to bill Tenant for any of the foregoing shall not waive Landlord's right to bill
Tenant for the same at a later time, provided that such bill is delivered to
Tenant no later than hundred eighty (180) days from the end of the calendar year
in which such utilities or services were performed or such costs incurred by
Landlord, as applicable.

               c. Temperature Balance. If the temperature otherwise maintained
in any portion of the Premises by the heating, air conditioning or ventilation
system is affected as a result of (i) the type or quantity of any lights,
machines or equipment (excluding typical office equipment in typical densities
for office use, which typical equipment and densities shall in no event include
dedicated computer rooms) used by Tenant in the Premises, (ii) the occupancy of
such portion of the Premises by more than one person per one hundred
seventy-five (175) square feet of rentable area therein, (iii) an electrical
load for lighting or power in excess of the limits specified in Paragraph 17.d.
below, or (iv) any rearrangement of partitioning or other improvements, then at
Tenant's sole cost, Landlord may install any equipment, or modify any existing
equipment (including the standard air conditioning equipment) Landlord
reasonably determines to be necessary to restore the temperature balance (such
new equipment or modifications to existing equipment termed herein "Temperature
Balance Equipment"). Tenant agrees to keep closed, when necessary, draperies
which, because of the sun's position, must be closed to provide for the
efficient operation of the air conditioning system, and Tenant agrees to
cooperate with Landlord and to abide by the regulations and requirements which
Landlord may prescribe for the proper functioning and protection of the heating,
ventilating and air conditioning system. Landlord makes no representation to
Tenant regarding the adequacy or fitness of the heating, air conditioning or
ventilation equipment in the Building to maintain temperatures that may be
required for, or because of, any computer or communications rooms, machine
rooms, conference rooms or other areas of high concentration of personnel or
electrical usage, or any other uses other than or in excess of the fractional
horsepower normally required for office equipment, and Landlord shall have no
liability for loss or damage suffered by Tenant or others in connection
therewith.

               d. Utility Connections. Tenant shall not connect or use any
apparatus or device in the Premises (i) using current in excess of 110 volts, or
(ii) which would cause Tenant's electrical demand load to exceed 1.0 watt per
rentable square foot for overhead lighting or 2.0 watts per rentable square foot
for convenience outlets, or (iii) which would exceed the capacity of the
existing panel or transformer serving the Premises (unless Tenant pays the cost
of modifying any such panel or transformer to increase its capacity so as to be
sufficient for Tenant's requirements). Tenant shall not connect with electric
current (except through existing outlets in the Premises or such additional
outlets as may be installed in the Premises as part of initial improvements or
Alterations approved by Landlord), or water pipes, any apparatus or device for
the purpose of using electrical current or water. Notwithstanding the foregoing,
Landlord acknowledges that Tenant shall have the right, at Tenant's sole cost
and expense, to install, as part of the Initial Alterations, an additional
electrical panel (400 amp, 277/480 3 phase) to serve the Premises, subject to
Landlord's reasonable approval as to the plans and specifications with respect
thereto and the other procedures and requirements of Paragraph


                                       19
<PAGE>

9 above applicable to the Initial Alterations. Landlord represents and warrants
to Tenant that power for such panel (i.e. 400 amp, 277/480 3 phase power) is
currently available from the existing bus duct on the sixth (6th) floor of the
Building.

        Landlord will not permit additional coring of the floor of the Premises
in order to install new electric outlets in the Premises unless Landlord is
satisfied, on the basis of such information to be supplied by Tenant at Tenant's
expense, that coring of the floor in order to install such additional outlets
will not weaken the structure of the floor.

               e. Interruption of Services. Landlord's obligation to provide
access to and utilities and services for the Premises are subject to the Rules
and Regulations of the Building, applicable Legal Requirements (including the
rules or actions of the public utility company furnishing the utility or
service), and shutdowns for maintenance and repairs, for security purposes, or
due to strikes, lockouts, labor disputes, fire or other casualty, acts of God,
or other causes beyond the reasonable control of Landlord. In the event of an
interruption in, or failure or inability to provide access to or any service or
utility for the Premises for any reason, such interruption, failure or inability
shall not constitute an eviction of Tenant, constructive or otherwise, or impose
upon Landlord any liability whatsoever, including, but not limited to, liability
for consequential damages or loss of business by Tenant. Tenant hereby waives
the provisions of California Civil Code Section 1932(1) or any other applicable
existing or future Legal Requirement permitting the termination of this Lease
due to such interruption, failure or inability. Notwithstanding the foregoing,
if any interruption in, or failure or inability to provide access to the
Premises or any of the services or utilities described in Paragraph 17.a. is
within Landlord's reasonable control and continues for ten (10) or more
consecutive days after Tenant's written notice thereof to Landlord, and Tenant
is unable to conduct and does not conduct any business in a material portion of
the Premises as a result thereof, then Tenant shall be entitled to an abatement
of Monthly Rent under Paragraph 5 hereof and Additional Rent under Paragraph 7
hereof, which abatement shall commence as of the first day after the expiration
of such ten (10) day period and terminate upon the cessation of such
interruption, failure or inability, and which abatement shall be based on the
portion of the Premises rendered inaccessible or unusable for Tenant's business
by such interruption, failure or inability. The abatement provision set forth
above shall be inapplicable to any interruption, failure or inability described
in this Paragraph 17.e. that is caused by (x) damage from fire or other casualty
(it being acknowledged that such situation shall be governed by Paragraph 26),
or (y) the gross negligence or willful misconduct of Tenant or its agents,
employees or contractors, except where Tenant reimburses Landlord for the
deductible required under Landlord's property damage/rental loss insurance.

               f. Governmental Controls. In the event any governmental authority
having jurisdiction over the Real Property or the Building promulgates or
revises any Legal Requirement or building, fire or other code or imposes
mandatory or voluntary controls or guidelines on Landlord or the Real Property
or the Building relating to the use or conservation of energy or utilities or
the reduction of automobile or other emissions (collectively "Controls") or in
the event Landlord is required or elects to make alterations to the Real
Property or the Building in order to comply with such mandatory or voluntary
Controls, Landlord may, in its sole discretion, comply with such Controls or
make such alterations to the Real Property or the Building related thereto. Such
compliance and the making of such alterations shall not constitute an eviction
of Tenant, constructive or otherwise, give rise to an abatement of rent pursuant
to Paragraph 17.e. or otherwise, or impose upon Landlord any liability
whatsoever, including, but not limited to, liability for consequential damages
or loss of business by Tenant. Landlord shall use its good faith efforts to
minimize disruption to Tenant's business caused by any such alterations, and,
without limitation, Landlord shall perform any extraordinarily noisy or
disruptive work after Business Hours or on weekends to the extent such
procedures would be generally followed by managers of other first class high
rise office buildings in the San Francisco financial district (except to the
extent an emergency and/or Legal Requirements require otherwise, as reasonably
determined by Landlord).

        18. Personal Property and Other Taxes. Tenant shall pay, at least ten
(10) days before delinquency, any and all taxes, fees, charges or other
governmental impositions levied or assessed against Landlord or Tenant (a) upon
Tenant's equipment, furniture, fixtures, improvements which are not normal and
customary general office improvements, and other personal property (including
carpeting installed by Tenant) located in the Premises, (b) by virtue of any
Alterations made by Tenant to the Premises, and (c) upon this transaction or any
document to which Tenant is a party creating or transferring an interest or an
estate in the Premises. If any such fee, charge or other governmental imposition
is paid by Landlord, Tenant shall reimburse Landlord for Landlord's payment upon
demand.

        19. Rules and Regulations. Tenant shall comply with the rules and
regulations set forth on Exhibit B attached hereto, as such rules and
regulations may be modified or amended by Landlord from time to time (the "Rules
and Regulations"), provided such amendments or modifications shall be reasonable
and non-discriminatory and shall not materially increase the burdens or
obligations imposed by this Lease upon Tenant and shall not prohibit the conduct
of any business in the Premises which Tenant is permitted to conduct pursuant to
Paragraphs 2.g. and 8 hereof. Landlord shall not be responsible to Tenant for
the nonperformance or noncompliance by any other tenant or occupant of the
Building of or with any of the Rules and Regulations, but Landlord shall not
enforce the Rules and Regulations in a discriminatory manner. In the


                                       20
<PAGE>

event of any conflict between the Rules and Regulations and the balance of this
Lease, the balance of this Lease shall control.

        20. Surrender; Holding Over.

               a. Surrender. Upon the expiration or other termination of this
Lease, Tenant shall surrender the Premises to Landlord vacant and broom-clean,
with all improvements and Alterations (except as provided in Paragraph 9 above)
in their original condition, except for reasonable wear and tear and damage from
casualty or condemnation; provided, however, that prior to the expiration or
termination of this Lease Tenant shall remove from the Premises any Alterations
that Tenant is required by Landlord to remove under the provisions of Paragraph
9, and all of Tenant's equipment and other personal property, trade fixtures,
and furniture. If such removal is not completed at the expiration or other
termination of this Lease, Landlord may remove the same at Tenant's expense. Any
damage to the Premises or the Building caused by such removal shall be repaired
promptly by Tenant (including the patching or repairing of ceilings and walls)
or, if Tenant fails to do so, Landlord may do so at Tenant's expense. The
removal of the Initial Alterations and other Alterations from the Premises shall
be governed by Paragraph 9 above. Tenant's obligations under this paragraph
shall survive the expiration or other termination of this Lease. Upon expiration
or termination of this Lease or of Tenant's possession, Tenant shall surrender
all keys to the Premises or any other part of the Building and shall make known
to Landlord the combination of locks on all safes, cabinets and vaults that may
be located in the Premises.

               b. Holding Over. If Tenant remains in possession of the Premises
after the expiration or earlier termination of this Lease with the express
written consent of Landlord, Tenant's occupancy shall be a month-to-month
tenancy at a rent agreed upon by Landlord and Tenant, but in no event less than
the greater of (i) one hundred fifty percent (150%) of the Monthly Rent and
Additional Rent payable under this Lease during the last full month prior to the
date of the expiration of this Lease or (ii) the then fair market rental (as
reasonably determined by Landlord) for the Premises. Except as provided in the
preceding sentence, the month-to-month tenancy shall be on the terms and
conditions of this Lease, except that any renewal options, expansion options,
rights of first refusal, rights of first negotiation or any other rights or
options pertaining to additional space in the Building contained in this Lease
shall be deemed to have terminated and shall be inapplicable thereto. Landlord's
acceptance of rent after such holding over with Landlord's written consent shall
not result in any other tenancy or in a renewal of the original term of this
Lease. If Tenant remains in possession of the Premises after the expiration or
earlier termination of this Lease without Landlord's consent, Tenant's continued
possession shall be on the basis of a tenancy at sufferance and Tenant shall pay
as Monthly Rent during the holdover period an amount equal to the greater of (i)
one hundred fifty percent (150%) of the fair market rental (as reasonably
determined by Landlord) for the Premises or (ii) two hundred percent (200%) of
the Monthly Rent and Additional Rent payable under this Lease for the last full
month prior to the date of such expiration or termination.

               c. Indemnification. If Tenant remains in possession of the
Premises after the expiration or earlier termination of this Lease without the
express written consent of Landlord, and such occupancy shall continue for more
than ten (10) days Landlord's written demand to Tenant that Tenant surrender
possession of the Premises to Landlord, Tenant shall indemnify, defend and hold
Landlord harmless from and against all Claims incurred by or asserted against
Landlord and arising directly or indirectly from Tenant's failure to timely
surrender the Premises, including but not limited to (i) any rent payable by or
any loss, cost, or damages, including lost profits, claimed by any prospective
tenant of the Premises or any portion thereof, and (ii) Landlord's damages as a
result of such prospective tenant rescinding or terminating a lease of the
Premises or any portion thereof by reason of such failure to timely surrender
the Premises.

        21. Subordination and Attornment.

               a. This Lease is expressly made subject and subordinate to any
mortgage, deed of trust, ground lease, underlying lease or like encumbrance
affecting any part of the Real Property or any interest of Landlord therein
which is now existing or hereafter executed or recorded, any present or future
modification, amendment or supplement to any of the foregoing, and to any
advances made thereunder (any of the foregoing being a "Superior Interest")
without the necessity of any further documentation evidencing such
subordination. Notwithstanding the foregoing, Tenant shall, within ten (10) days
after Landlord's request, execute and deliver to Landlord a document evidencing
the subordination of this Lease to a particular Superior Interest. If the
interest of Landlord in the Real Property or the Building is transferred to any
person ("Purchaser") pursuant to or in lieu of proceedings for enforcement of
any Superior Interest, Tenant shall immediately and automatically attorn to the
Purchaser, and this Lease shall continue in full force and effect as a direct
lease between the Purchaser and Tenant on the terms and conditions set forth
herein. Notwithstanding the foregoing, if a Superior Interest is created
following the execution of this Lease, Landlord's delivery to Tenant of a
non-disturbance agreement with respect thereto as described in Paragraph 21.b.
below and otherwise in such holder's standard institutional form or other
reasonable form shall be a condition to the subordination of this Lease thereto,
provided that Tenant pays any fees or charges required by such holder in order
to obtain such non-disturbance agreement.


                                       21
<PAGE>

               b. Landlord will request that the holders of any Superior
Interests in place as of the date of this Lease execute a written
"non-disturbance agreement" on Tenant's behalf providing that, if Tenant is not
in default under this Lease beyond any applicable grace period, that such party
will recognize this Lease and Tenant's rights hereunder and will not disturb
Tenant's possession hereunder, and if this Lease is by operation of law
terminated in a foreclosure, that a new lease will be entered into on the same
terms as this Lease for the remaining term hereof. The failure of any such
holder of a Superior Interest to execute and deliver such a non-disturbance
agreement upon Landlord's request shall not constitute a default hereunder by
Landlord, it being understood that Landlord's sole obligation is to request in
good faith the execution and delivery of such agreement. Further, if in order to
obtain such non-disturbance agreement from any such holder of a Superior
Interest Landlord is required to expend any sum, Landlord shall so notify Tenant
and Tenant shall either pay such sum or be deemed to have released Landlord from
any further obligation to obtain such non-disturbance agreement. In no event
shall Landlord be required to expend any sums in connection therewith.

        22. Financing Condition. If any lender or ground lessor that intends to
acquire an interest in, or holds a mortgage, ground lease or deed of trust
encumbering any portion of the Real Property should require either the execution
by Tenant of an agreement requiring Tenant to send such lender written notice of
any default by Landlord under this Lease, giving such lender the right to cure
such default within any period afforded to Landlord to cure the same plus an
additional ninety (90) days (with such period afforded to such lender or ground
lessor to commence from the giving of notice to such lender or ground lessor or,
so long as Tenant shall continue to receive all of the material services
Landlord is required to provide under this Lease and such lender or ground
lessor is diligently pursuing appointment of a receiver, foreclosure proceedings
or termination of such ground lease, such period to commence when such lender
has obtained the appointment of a receiver for the Real Property or completed
foreclosure (whichever shall be first) or such ground lessor has terminated such
ground lease), and preventing Tenant from terminating this Lease (to the extent
such right is available to Tenant under this Lease) unless such default remains
uncured after such period as so extended, and/or any modification of the
agreements, covenants, conditions or provisions of this Lease, then Tenant
agrees that it shall, within fifteen (15) days after Landlord's request, execute
and deliver such agreement and modify this Lease as required by such lender or
ground lessor; provided, however, that no such modification shall affect the
length of the term or increase the rent payable by Tenant under Paragraphs 5 and
7 or otherwise increase Tenant's obligations (other than notice requirements and
other similar ministerial obligations). Tenant acknowledges and agrees that its
failure to timely execute any such agreement or modification required by such
lender or ground lessor may cause Landlord serious financial damage by causing
the failure of a financing transaction and giving Landlord all of its rights and
remedies under Paragraph 25 below, including its right to damages caused by the
loss of such financing.

        23. Entry by Landlord. Landlord may, at any and all reasonable times,
and upon reasonable advance notice (provided that no advance notice need be
given if an emergency (as determined by Landlord in its reasonable judgment)
necessitates an immediate entry or prior to entry to provide routine janitorial
services), enter the Premises to (a) inspect the same and to determine whether
Tenant is in compliance with its obligations hereunder, (b) supply janitorial
and any other service Landlord is required to provide hereunder, (c) show the
Premises to prospective lenders, purchasers or tenants, (d) post notices of
nonresponsibility, and (e) alter, improve or repair the Premises or any other
portion of the Real Property. In connection with any such alteration,
improvement or repair, Landlord may erect in the Premises or elsewhere in the
Real Property scaffolding and other structures reasonably required for the work
to be performed. Except as otherwise expressly provided in this Lease, in no
event shall such entry or work entitle Tenant to an abatement of rent,
constitute an eviction of Tenant, constructive or otherwise, or impose upon
Landlord any liability whatsoever, including but not limited to liability for
consequential damages or loss of business or profits by Tenant; provided,
however, that Landlord shall use good faith efforts to cause all such work to be
done in such a manner as to cause as little interference to Tenant as reasonably
possible without incurring additional expense. Landlord shall at all times
retain a key with which to unlock all of the doors in the Premises, except
Tenant's vaults and safes. If an emergency necessitates immediate access to the
Premises, Landlord may use whatever force is necessary to enter the Premises and
any such entry to the Premises shall not constitute a forcible or unlawful entry
into the Premises, a detainer of the Premises, or an eviction of Tenant from the
Premises, or any portion thereof.

        24. Insolvency or Bankruptcy. The occurrence of any of the following
shall constitute an Event of Default under Paragraph 25 below:

               1. Tenant ceases doing business as a going concern, makes an
assignment for the benefit of creditors, is adjudicated an insolvent, files a
petition (or files an answer admitting the material allegations of such
petition) seeking for Tenant any reorganization, arrangement, composition,
readjustment, liquidation, dissolution or similar arrangement under any state or
federal bankruptcy or other law, or Tenant consents to or acquiesces in the
appointment, pursuant to any state or federal bankruptcy or other law, of a
trustee, receiver or liquidator for the Premises, for Tenant or for all or any
substantial part of Tenant's assets; or

               2. Tenant fails within sixty (60) days after the commencement of
any proceedings against Tenant seeking reorganization, arrangement, composition,
readjustment, liquidation, dissolution or


                                       22
<PAGE>

similar relief under any state or federal bankruptcy or other Legal Requirement,
to have such proceedings dismissed, or Tenant fails, within sixty (60) days
after an appointment pursuant to any state or federal bankruptcy or other Legal
Requirement without Tenant's consent or acquiescence, of any trustee, receiver
or liquidator for the Premises, for Tenant or for all or any substantial part of
Tenant's assets, to have such appointment vacated; or

               3. Tenant is unable, or admits in writing its inability, to pay
its debts as they mature; or

               4. Tenant gives notice to any governmental body of its insolvency
or pending insolvency, or of its suspension or pending suspension of operations.

        In no event shall this Lease be assigned or assignable by reason of any
voluntary or involuntary bankruptcy, insolvency or reorganization proceedings,
nor shall any rights or privileges hereunder be an asset of Tenant, the trustee,
debtor-in-possession, or the debtor's estate in any bankruptcy, insolvency or
reorganization proceedings.

        25. Default and Remedies.

               a. Events of Default. The occurrence of any of the following
shall constitute an "Event of Default" by Tenant:

                      1. Tenant fails to pay when due Monthly Rent, Additional
Rent or any other rent due hereunder within five (5) days after written notice
from Landlord that such sum is due, except that Landlord shall only be required
to give one such notice in any calendar year, and after any such notice is given
any failure by Tenant in such calendar year to pay Monthly Rent, Additional Rent
or any other rent due hereunder within five (5) days after due shall itself
constitute an Event of Default, without the requirement of notice from Landlord
of such failure; or

                      2. Tenant abandons (within the meaning of California Civil
Code Section 1951.2) the Premises or any portion thereof; or

                      3. Tenant fails to deliver any estoppel certificate
pursuant to Paragraph 29 below, subordination agreement pursuant to Paragraph 21
above, or document required pursuant to Paragraph 22 above, within the
applicable period set forth therein; or

                      4. Tenant violates the bankruptcy and insolvency
provisions of Paragraph 24 above; or

                      5. Tenant makes or has made or furnishes or has furnished
any warranty, representation or statement to Landlord in connection with this
Lease, or any other agreement made by Tenant for the benefit of Landlord, which
is or was false or misleading in any material respect when made or furnished; or

                      6. Tenant assigns this Lease or subleases any portion of
the Premises in violation of Paragraph 13 above; or

                      7. Tenant fails to comply with any other provision of this
Lease in the manner required pursuant to this Lease within thirty (30) days
after written notice from Landlord of such failure (or if the noncompliance
cannot by its nature be cured within the 30-day period, if Tenant fails to
commence to cure such noncompliance within the 30-day period and thereafter
diligently prosecute such cure to completion).

               b. Remedies. Upon the occurrence of an Event of Default Landlord
shall have the following remedies, which shall not be exclusive but shall be
cumulative and shall be in addition to any other remedies now or hereafter
allowed by law:

                      1. Landlord may terminate Tenant's right to possession of
the Premises at any time by written notice to Tenant. Tenant expressly
acknowledges that in the absence of such written notice from Landlord, no other
act of Landlord, including, but not limited to, its re-entry into the Premises,
its efforts to relet the Premises, its reletting of the Premises for Tenant's
account, its storage of Tenant's personal property and trade fixtures, its
acceptance of keys to the Premises from Tenant, its appointment of a receiver,
or its exercise of any other rights and remedies under this Paragraph 25 or
otherwise at law, shall constitute an acceptance of Tenant's surrender of the
Premises or constitute a termination of this Lease or of Tenant's right to
possession of the Premises.

        Upon such termination in writing of Tenant's right to possession of the
Premises, this Lease shall terminate and Landlord shall be entitled to recover
damages from Tenant as provided in California Civil


                                       23
<PAGE>

Code Section 1951.2 or any other applicable existing or future Legal Requirement
providing for recovery of damages for such breach, including but not limited to
the following:

                             (i) The reasonable cost of recovering the Premises;
plus

                             (ii) The reasonable cost of removing Tenant's
Alterations, trade fixtures and improvements; plus

                             (iii) All unpaid rent due or earned hereunder prior
to the date of termination, less the proceeds of any reletting or any rental
received from subtenants prior to the date of termination applied as provided in
Paragraph 25.b.2. below, together with interest at the Interest Rate, on such
sums from the date such rent is due and payable until the date of the award of
damages; plus

                             (iv) The amount by which the rent which would be
payable by Tenant hereunder, including Additional Rent under Paragraph 7 above,
as reasonably estimated by Landlord, from the date of termination until the date
of the award of damages, exceeds the amount of such rental loss as Tenant proves
could have been reasonably avoided, together with interest at the Interest Rate
on such sums from the date such rent is due and payable until the date of the
award of damages; plus

                             (v) The amount by which the rent which would be
payable by Tenant hereunder, including Additional Rent under Paragraph 7 above,
as reasonably estimated by Landlord, for the remainder of the then term, after
the date of the award of damages exceeds the amount such rental loss as Tenant
proves could have been reasonably avoided, discounted at the discount rate
published by the Federal Reserve Bank of San Francisco for member banks at the
time of the award plus one percent (1%); plus

                             (vi) Such other amounts in addition to or in lieu
of the foregoing as may be permitted from time to time by applicable law,
including without limitation any other amount necessary to compensate Landlord
for all the detriment proximately caused by Tenant's failure to perform its
obligations under this Lease or which in the ordinary course of things would be
likely to result therefrom.

                      2. Landlord has the remedy described in California Civil
Code Section 1951.4 (a landlord may continue the lease in effect after the
tenant's breach and abandonment and recover rent as it becomes due, if the
tenant has the right to sublet and assign subject only to reasonable
limitations), and may continue this Lease in full force and effect and may
enforce all of its rights and remedies under this Lease, including, but not
limited to, the right to recover rent as it becomes due. After the occurrence of
an Event of Default, Landlord may enter the Premises without terminating this
Lease and sublet all or any part of the Premises for Tenant's account to any
person, for such term (which may be a period beyond the remaining term of this
Lease), at such rents and on such other terms and conditions as Landlord deems
advisable. In the event of any such subletting, rents received by Landlord from
such subletting shall be applied (i) first, to the payment of the costs of
maintaining, preserving, altering and preparing the Premises for subletting, the
other costs of subletting, including but not limited to brokers' commissions,
attorneys' fees and expenses of removal of Tenant's personal property, trade
fixtures and Alterations; (ii) second, to the payment of rent then due and
payable hereunder; (iii) third, to the payment of future rent as the same may
become due and payable hereunder; (iv) fourth, the balance, if any, shall be
paid to Tenant upon (but not before) expiration of the term of this Lease. If
the rents received by Landlord from such subletting, after application as
provided above, are insufficient in any month to pay the rent due and payable
hereunder for such month, Tenant shall pay such deficiency to Landlord monthly
upon demand. Notwithstanding any such subletting for Tenant's account without
termination, Landlord may at any time thereafter, by written notice to Tenant,
elect to terminate this Lease by virtue of a previous Event of Default.

               During the continuance of an Event of Default, for so long as
Landlord does not terminate Tenant's right to possession of the Premises and
subject to Paragraph 13, entitled Assignment and Subletting, and the options
granted to Landlord thereunder, Landlord shall not unreasonably withhold its
consent to an assignment or sublease of Tenant's interest in the Premises or in
this Lease.

                      3. During the continuance of an Event of Default, and
after Tenant's abandonment of the Premises (within the meaning of California
Civil Code Section 1951.2) or Landlord's eviction of Tenant from the Premises by
appropriate legal proceedings, Landlord may enter the Premises without
terminating this Lease and remove all Tenant's personal property, Alterations
and trade fixtures from the Premises and store them at Tenant's risk and
expense. If Landlord removes such property from the Premises and stores it at
Tenant's risk and expense, and if Tenant fails to pay the cost of such removal
and storage after written demand therefor and/or to pay any rent then due, then
after the property has been stored for a period of thirty (30) days or more
Landlord may sell such property at public or private sale, in the manner and at
such times and places as Landlord deems commercially reasonable following
reasonable notice to Tenant of the time and place of such sale. The proceeds of
any such sale shall be applied first to the payment of the expenses for removal
and storage of the property, the preparation for and the conducting of such
sale, and for attorneys' fees and other legal expenses incurred by Landlord in
connection therewith, and the balance shall be applied as provided in Paragraph
25.b.2. above.


                                       24
<PAGE>

        Tenant hereby waives all claims for damages that may be caused by
Landlord's reentering and taking possession of the Premises or removing and
storing Tenant's personal property pursuant to this Paragraph 25, and Tenant
shall indemnify, defend and hold Landlord harmless from and against any and all
Claims resulting from any such act. No reentry by Landlord shall constitute or
be construed as a forcible entry by Landlord.

                      4. Landlord may require Tenant to remove any and all
Alterations from the Premises or, if Tenant fails to do so within ten (10) days
after Landlord's request, Landlord may do so at Tenant's expense.

                      5. Landlord may cure the Event of Default at Tenant's
expense, it being understood that such performance shall not waive or cure the
subject Event of Default. If Landlord pays any sum or incurs any expense in
curing the Event of Default, Tenant shall reimburse Landlord upon demand for the
amount of such payment or expense with interest at the Interest Rate from the
date the sum is paid or the expense is incurred until Landlord is reimbursed by
Tenant. Any amount due Landlord under this subsection shall constitute
additional rent hereunder.

               c. Waiver of Redemption. Tenant hereby waives, for itself and all
persons claiming by and under Tenant, all rights and privileges which it might
have under any present or future Legal Requirement to redeem the Premises or to
continue this Lease after being dispossessed or ejected from the Premises.

        26. Damage or Destruction. If all or a part of the Premises are damaged
by fire or other casualty, or if the Building is so damaged that access to or
use and occupancy of the Premises is materially impaired, within thirty (30)
days of the date of the damage Landlord shall give Tenant notice of Landlord's
reasonable estimate of the time required from the date of the damage to repair
the damage (the "Damage Estimate"). If the Damage Estimate is one hundred fifty
(150) days or less, then Landlord shall repair the damage and this Lease shall
remain in full force and effect. If the Damage Estimate is more than one hundred
fifty (150) days, Landlord, at its option exercised by written notice to Tenant
within sixty (60) days of the date of the damage, shall either (a) repair the
damage, in which event this Lease shall continue in full force and effect, or
(b) terminate this Lease as of the date specified by Landlord in the notice,
which date shall be not less than thirty (30) days nor more than sixty (60) days
after the date such notice is given, and this Lease shall terminate on the date
specified in the notice. If the Damage Estimate is more than one (1) year, and
Landlord does not give notice terminating this Lease, then Tenant may give
notice to Landlord, within thirty (30) calendar days after Tenant receives the
Damage Estimate, terminating this Lease as of the date specified in Tenant's
termination notice, which date shall not be before the date of such notice or
more than thirty (30) days after the date of Tenant's termination notice.

        Notwithstanding anything to contrary contained in this Paragraph 26, if
the initial Damage Estimate is more than ninety (90) days, and the date on which
Landlord reasonably anticipates the repairs of such damage will be completed is
during the last twelve (12) months of the Lease term, Landlord and Tenant shall
each have the option to terminate this Lease by giving written notice to the
other, in the case of Landlord together with the Damage Estimate, or, in the
case of Tenant, within thirty (30) days of Tenant's receipt of the Damage
Estimate, and this Lease shall terminate as of the date specified by the party
in its termination notice, which date shall not be before the date of such
notice or more than thirty (30) days after the date of such notice.
Notwithstanding the foregoing, if Landlord shall purport to exercise its
termination right pursuant to this paragraph, and within fifteen (15) days
thereafter Tenant shall validly exercise any theretofore unexercised renewal
option under Paragraph 52 below, Landlord's exercise of such termination right
shall be deemed void and of no force and effect, but the remaining provisions of
this Paragraph 26 shall fully apply with respect to such fire or other casualty,
and any rights of Landlord (but not Tenant) to terminate this Lease pursuant to
the first paragraph of this Paragraph 26 on account of such fire or other
casualty shall survive and remain exercisable in accordance with the terms of
such first paragraph.

        Notwithstanding anything to the contrary in the Paragraph 26, if damage
which would otherwise lead to a right to terminate this Lease results from the
willful misconduct of Landlord or Tenant, the party from whose misconduct such
damage results shall have no right to terminate this Lease.

        If the fire or other casualty damages the Premises or the common areas
of the Real Property necessary for Tenant's use and occupancy of the Premises,
and Tenant ceases to use any portion of the Premises as a result of such damage,
then during the period the Premises or portion thereof are rendered unusable by
such damage and repair, Tenant's Monthly Rent and Additional Rent under
Paragraphs 5 and 7 above shall be proportionately reduced based upon the extent
to which the damage and repair prevents Tenant from conducting, and Tenant does
not conduct, its business at the Premises; provided, however, if the damage
results from the gross negligence or willful misconduct of Tenant or Tenant's
agents, employees, contractors, licensees or invitees, then Tenant's Monthly
Rent and Additional Rent will not abate unless Tenant reimburses Landlord for
the deductible required under Landlord's property damage/rental loss insurance.
Landlord shall not be obligated to repair or replace any of Tenant's movable
furniture, equipment, trade fixtures, and other personal property, nor any
Alterations installed in the Premises by Tenant which are not normal and
customary general office improvements, and no damage to any of the foregoing
shall entitle Tenant to any


                                       25
<PAGE>

abatement, and Tenant shall, at Tenant's sole cost and expense, repair and
replace such items. All such repair and replacement of Alterations shall be
constructed in accordance with Paragraph 9 above regarding Alterations. Where
Landlord is obligated to repair any damage pursuant to this Paragraph 26,
Landlord's obligation shall include the obligation to repair (or replace, as
applicable) any Alterations installed in the Premises which are normal and
customary general office improvements.

        A total destruction of the Building shall automatically terminate this
Lease. In no event shall Tenant be entitled to any compensation or damages from
Landlord for loss of use of the whole or any part of the Premises or for any
inconvenience occasioned by any such destruction, rebuilding or restoration of
the Premises, the Building or access thereto, except for the rent abatement
expressly provided above. Tenant hereby waives California Civil Code Sections
1932(2) and 1933(4), providing for termination of hiring upon destruction of the
thing hired and Sections 1941 and 1942, providing for repairs to and of
premises.

        27. Eminent Domain.

               a. If all or any part of the Premises are taken by any public or
quasi-public authority under the power of eminent domain, or any agreement in
lieu thereof (a "taking"), this Lease shall terminate as to the portion of the
Premises taken effective as of the date of taking. If only a portion of the
Premises is taken, Landlord or Tenant may terminate this Lease as to the
remainder of the Premises upon written notice to the other party within ninety
(90) days after the taking; provided, however, that Tenant's right to terminate
this Lease is conditioned upon the remaining portion of the Premises being of
such size or configuration that such remaining portion of the Premises is
unusable or uneconomical for Tenant's business. Landlord shall be entitled to
all compensation, damages, income, rent awards and interest thereon whatsoever
which may be paid or made in connection with any taking and Tenant shall have no
claim against Landlord or any governmental authority for the value of any
unexpired term of this Lease or of any of the improvements or Alterations in the
Premises; provided, however, that the foregoing shall not prohibit Tenant from
prosecuting a separate claim against the taking authority for an amount
separately designated for Tenant's relocation expenses or the interruption of or
damage to Tenant's business or as compensation for Tenant's personal property,
trade fixtures, Alterations or other improvements paid for by Tenant so long as
any award to Tenant will not reduce the award to Landlord.

        In the event of a partial taking of the Premises which does not result
in a termination of this Lease, the Monthly Rent and Additional Rent under
Paragraphs 5 and 7 hereunder shall be equitably reduced. If all or any material
part of the Real Property other than the Premises is taken, Landlord may
terminate this Lease upon written notice to Tenant given within ninety (90) days
after the date of taking. If a portion of the Real Property other than the
Premises is taken, and such taking renders Tenant without reasonable access to
the Premises, Tenant may terminate this Lease upon written notice to Landlord
given within thirty (30) days after the date of taking. Any termination pursuant
to this paragraph shall be effective as of the date specified by the party in
its termination notice, which date shall not be before the date of such notice
or more than thirty (30) days after the date of such notice.

               b. Notwithstanding the foregoing, if all or any portion of the
Premises is taken for a period of time not exceeding one (1) year ending prior
to the end of the term of this Lease, this Lease shall remain in full force and
effect and Tenant shall continue to pay all rent and to perform all of its
obligations under this Lease; provided, however, that Tenant shall be entitled
to all compensation, damages, income, rent awards and interest thereon that is
paid or made in connection with such temporary taking of the Premises (or
portion thereof), except that any such compensation in excess of the rent or
other amounts payable to Landlord hereunder shall be promptly paid over to
Landlord as received. Landlord and Tenant each hereby waive the provisions of
California Code of Civil Procedure Section 1265.130 and any other applicable
existing or future Legal Requirement providing for, or allowing either party to
petition the courts of the state in which the Real Property is located for, a
termination of this Lease upon a partial taking of the Premises and/or the
Building.

        28. Landlord's Liability; Sale of Building. The term "Landlord," as used
in this Lease, shall mean only the owner or owners of the Real Property at the
time in question. Notwithstanding any other provision of this Lease, the
liability of Landlord for its obligations under this Lease is limited solely to
Landlord's interest in the Real Property as the same may from time to time be
encumbered, and no personal liability shall at any time be asserted or
enforceable against any other assets of Landlord or against the constituent
shareholders, partners or other owners of Landlord, or the directors, officers,
employees and agents of Landlord or such constituent shareholder, partner or
other owner, on account of any of Landlord's obligations or actions under this
Lease. In addition, in the event of any conveyance of title to the Real
Property, then the grantor or transferor shall be relieved of all liability with
respect to Landlord's obligations to be performed under this Lease after the
date of such conveyance. In no event shall Landlord be deemed to be in default
under this Lease unless Landlord fails to perform its obligations under this
Lease, Tenant delivers to Landlord written notice specifying the nature of
Landlord's alleged default, and Landlord fails to cure such default within
thirty (30) days following receipt of such notice (or, if the default cannot
reasonably be cured within such period, to commence action within such thirty
(30)-day period and proceed diligently thereafter to cure such default). Upon
any conveyance of title to the Real Property, the grantee or transferee shall be
deemed to have assumed Landlord's obligations to be performed under this Lease
from and after the


                                       26
<PAGE>

date of such conveyance, subject to the limitations on liability set forth above
in this Paragraph 28. If Tenant provides Landlord with any security for Tenant's
performance of its obligations hereunder, and Landlord transfers such security
to the grantee or transferee of Landlord's interest in the Real Property,
Landlord shall be released from any further responsibility or liability for such
security. Notwithstanding any other provision of this Lease, but not in
limitation of the provisions of Paragraph 14.a. above, Landlord shall not be
liable for any consequential damages or interruption or loss of business, income
or profits, or claims of constructive eviction, nor shall Landlord be liable for
loss of or damage to artwork, currency, jewelry, bullion, unique or valuable
documents, securities or other valuables, or for other property not in the
nature of ordinary fixtures, furnishings and equipment used in general
administrative and executive office activities and functions (all of the
foregoing damages, losses and claims described in this sentence, collectively,
"Special Claims and Damages"). Wherever in this Lease Tenant (a) releases
Landlord from any claim or liability, (b) waives or limits any right of Tenant
to assert any claim against Landlord or to seek recourse against any property of
Landlord or (c) agrees to indemnify Landlord against any matters, the relevant
release, waiver, limitation or indemnity shall run in favor of and apply to
Landlord, the constituent shareholders, partners or other owners of Landlord,
and the directors, officers, employees and agents of Landlord and each such
constituent shareholder, partner or other owner.

        29. Estoppel Certificates. At any time and from time to time, upon not
less than ten (10) Business Days' prior notice from Landlord, Tenant shall
execute, acknowledge and deliver to Landlord a statement certifying the
commencement date of this Lease, stating that this Lease is unmodified and in
full force and effect (or if there have been modifications, that this Lease is
in full force and effect as modified and the date and nature of each such
modification), that to the best of Tenant's knowledge Landlord is not in default
under this Lease (or, if Landlord is in default, specifying the nature of such
default), that Tenant is not in default under this Lease (or if Tenant is in
default, specifying the nature of such default), the current amounts of and the
dates to which the Monthly Rent and Additional Rent has been paid, and setting
forth such other matters as may be reasonably requested by Landlord. Any such
statement may be conclusively relied upon by a prospective purchaser of the Real
Property or by a lender obtaining a lien on the Real Property as security. If
Tenant fails to deliver such statement within the time required hereunder, such
failure shall be conclusive upon Tenant that (i) this Lease is in full force and
effect, without modification except as may be represented by Landlord, (ii)
there are no uncured defaults in Landlord's performance of its obligations
hereunder, (iii) not more than one month's installment of Monthly Rent has been
paid in advance, and (iv) any other statements of fact included by Landlord in
such statement are correct. Tenant acknowledges and agrees that its failure to
execute such certificate may cause Landlord serious financial damage by causing
the failure of a sale or financing transaction and giving Landlord all of its
rights and remedies under Paragraph 25 above, including its right to damages
caused by the loss of such sale or financing.

        30. Right of Landlord to Perform. If Tenant fails to make any payment
required hereunder (other than Monthly Rent and Additional Rent) or fails to
perform any other of its obligations hereunder, after the expiration of any
applicable grace or cure period (unless waiting for such period to expire would
jeopardize the health, safety or quiet enjoyment of the Building by its tenants
and occupants or cause further damage or loss to Landlord or the Real Property,
as reasonably determined by Landlord, or result in any violation (or continuance
of any violation) of any Legal Requirement), Landlord may, but shall not be
obliged to, and without waiving any default of Tenant or releasing Tenant from
any obligations to Landlord hereunder, make any such payment or perform any
other such obligation on Tenant's behalf. All sums so paid by Landlord and all
necessary incidental costs in connection with the performance by Landlord of an
obligation of Tenant (together with interest thereon from the date of such
payment by Landlord until paid at the Interest Rate) shall be payable by Tenant
to Landlord upon demand, and Tenant's failure to make such payment upon demand
shall entitle Landlord to the same rights and remedies provided Landlord in the
event of non-payment of rent.

        31. Late Charge. Tenant acknowledges that late payment of any
installment of Monthly Rent or Additional Rent or any other amount required
under this Lease will cause Landlord to incur costs not contemplated by this
Lease and that the exact amount of such costs would be extremely difficult and
impracticable to fix. Such costs include, without limitation, processing and
accounting charges, late charges that may be imposed on Landlord by the terms of
any encumbrance or note secured by the Real Property and the loss of the use of
the delinquent funds. Therefore, if any installment of Monthly Rent or
Additional Rent or any other amount due from Tenant is not received within five
(5) days after due, Tenant shall pay to Landlord on demand, on account of the
delinquent payment, an additional sum equal to the greater of (i) five percent
(5%) of the overdue amount, or (ii) $100.00, which additional sum represents a
fair and reasonable estimate of the costs that Landlord will incur by reason of
late payment by Tenant. Notwithstanding the foregoing, Landlord shall give
Tenant notice of non-payment of any amounts required of Tenant under this Lease
and five (5) days after delivery of such notice to cure such non-payment once in
each calendar year before assessing the late charge in such calendar year
pursuant to this Paragraph 31. Acceptance of any late charge shall not
constitute a waiver of Tenant's default with respect to the overdue amount, nor
prevent Landlord from exercising its right to collect interest as provided
above, rent, or any other damages, or from exercising any of the other rights
and remedies available to Landlord.

        32. Attorneys' Fees; Waiver of Jury Trial. In the event of any action or
proceeding between Landlord and Tenant (including an action or proceeding
between Landlord and the trustee or debtor in


                                       27
<PAGE>

possession while Tenant is a debtor in a proceeding under any bankruptcy law) to
enforce any provision of this Lease, the losing party shall pay to the
prevailing party all costs and expenses, including, without limitation,
reasonable attorneys' fees and expenses, incurred in such action and in any
appeal in connection therewith by such prevailing party. The "prevailing party"
will be determined by the court before whom the action or proceeding was brought
based upon an assessment of which party's major arguments or positions taken in
the suit or proceeding could fairly be said to have prevailed over the other
party's major arguments or positions on major disputed issues in the court's
decision. Notwithstanding the foregoing, however, Landlord shall be deemed the
prevailing party in any unlawful detainer or other action or proceeding
instituted by Landlord based upon any default or alleged default of Tenant
hereunder if (i) judgment is entered in favor of Landlord, or (ii) prior to
trial or judgment Tenant pays all or any portion of the rent claimed by
Landlord, vacates the Premises, or otherwise cures the default claimed by
Landlord.

        If Landlord becomes involved in any litigation or dispute, threatened or
actual, by or against anyone not a party to this Lease, but arising by reason of
or related to any act or omission of Tenant or any Tenant Party, Tenant agrees
to pay Landlord's reasonable attorneys' fees and other costs incurred in
connection with the litigation or dispute, regardless of whether a lawsuit is
actually filed.

        IF ANY ACTION OR PROCEEDING BETWEEN LANDLORD AND TENANT TO ENFORCE THE
PROVISIONS OF THIS LEASE (INCLUDING AN ACTION OR PROCEEDING BETWEEN LANDLORD AND
THE TRUSTEE OR DEBTOR IN POSSESSION WHILE TENANT IS A DEBTOR IN A PROCEEDING
UNDER ANY BANKRUPTCY LAW) PROCEEDS TO TRIAL, LANDLORD AND TENANT HEREBY WAIVE
THEIR RESPECTIVE RIGHTS TO A JURY IN SUCH TRIAL. Landlord and Tenant agree that
this paragraph constitutes a written consent to waiver of trial by jury within
the meaning of California Code of Civil Procedure Section 631(a)(2), and Tenant
does hereby authorize and empower Landlord to file this paragraph and/or this
Lease, as required, with the clerk or judge of any court of competent
jurisdiction as a written consent to waiver of jury trial.

        33. Waiver. No provisions of this Lease shall be deemed waived by
Landlord or Tenant unless such waiver is in a writing signed by the party giving
such waiver. The waiver by either party of any breach of any provision of this
Lease by the other party shall not be deemed a waiver of any subsequent breach
of the same or any other provision of this Lease. No delay or omission in the
exercise of any right or remedy of Landlord upon any default by Tenant, or of
Tenant upon any default of Landlord, shall impair such right or remedy or be
construed as a waiver. Landlord's acceptance of any payments of rent due under
this Lease shall not be deemed a waiver of any default by Tenant under this
Lease (including Tenant's recurrent failure to timely pay rent) other than
Tenant's nonpayment of the accepted sums, and no endorsement or statement on any
check or accompanying any check or payment shall be deemed an accord and
satisfaction. Tenant's payment of rent due and Tenant's continuance in
possession shall not constitute a waiver by Tenant of any default of Landlord.
Landlord's consent to or approval of any act by Tenant requiring Landlord's
consent or approval shall not be deemed to waive or render unnecessary
Landlord's consent to or approval of any subsequent act by Tenant.

        34. Notices. All notices and demands which may or are required to be
given by either party to the other hereunder shall be in writing. All notices
and demands by Landlord to Tenant shall be delivered personally or sent by
United States mail, postage prepaid, or by any reputable overnight or same-day
courier, addressed to Tenant at the Premises, Attention: General Counsel, or to
such other place as Tenant may from time to time designate by notice to Landlord
hereunder, except that prior to the date Tenant shall commence the conduct of
business from the Premises, they shall be addressed to Tenant at 532 Folsom
Street, San Francisco, California 94105, Attention: General Counsel. All notices
and demands by Tenant to Landlord shall be sent by United States mail, postage
prepaid, or by any reputable overnight or same-day courier, addressed to
Landlord in care of Shorenstein Company, L.P., 555 California Street, 49th
floor, San Francisco, California 94104, or to such other place as Landlord may
from time to time designate by notice to Tenant hereunder. Notices delivered
personally or sent same-day courier will be effective immediately upon delivery
to the addressee at the designated address; notices sent by overnight courier
will be effective one (1) Business Day after acceptance by the service for
delivery; notices sent by mail will be effective two (2) Business Days after
mailing. In the event Tenant requests multiple notices hereunder, Tenant will be
bound by such notice from the earlier of the effective times of the multiple
notices.

        35. Deleted.

        36. Defined Terms and Marginal Headings. When required by the context of
this Lease, the singular includes the plural. If more than one person or entity
signs this Lease as Tenant, the obligations hereunder imposed upon Tenant shall
be joint and several, and the act of, written notice to or from, refund to, or
signature of, any Tenant signatory to this Lease (including without limitation
modifications of this Lease made by fewer than all such Tenant signatories)
shall bind every other Tenant signatory as though every other Tenant signatory
had so acted, or received or given the written notice or refund, or signed. The
headings and titles to the paragraphs of this Lease are for convenience only and
are not to be used to interpret or construe this Lease. Wherever the term
"including" or "includes" is used in this Lease it shall be construed as if
followed by the phrase "without limitation." The language in all parts of this
Lease shall in all cases be


                                       28
<PAGE>

construed as a whole and in accordance with its fair meaning and not construed
for or against any party simply because one party was the drafter thereof.

        37. Time and Applicable Law. Time is of the essence of this Lease and of
each and all of its provisions. This Lease shall be governed by and construed in
accordance with the laws of the State of California, and the venue of any action
or proceeding under this Lease shall be the City and County of San Francisco,
California.

        38. Successors. Subject to the provisions of Paragraphs 13 and 28 above,
the covenants and conditions hereof shall be binding upon and inure to the
benefit of the parties hereto and their respective heirs, personal
representatives, successors, executors, administrators and assigns.

        39. Entire Agreement; Modifications. This Lease (including any exhibit,
rider or attachment hereto) constitutes the entire agreement between Landlord
and Tenant with respect to Tenant's lease of the Premises. No provision of this
Lease may be amended or otherwise modified except by an agreement in writing
signed by the parties hereto. Neither Landlord nor Landlord's agents have made
any representations or warranties with respect to the Premises, the Building,
the Real Property or this Lease except as expressly set forth herein, including
without limitation any representations or warranties as to the suitability or
fitness of the Premises for the conduct of Tenant's business or for any other
purpose, nor has Landlord or its agents agreed to undertake any alterations or
construct any improvements to the Premises except those, if any, expressly
provided in this Lease, and no rights, easements or licenses shall be acquired
by Tenant by implication or otherwise unless expressly set forth herein. Neither
this Lease nor any memorandum hereof shall be recorded by Tenant.

        40. Light and Air. Tenant agrees that no diminution of light, air or
view by any structure which may hereafter be erected (whether or not by
Landlord) shall entitle Tenant to any reduction of rent hereunder, result in any
liability of Landlord to Tenant, or in any other way affect this Lease.

        41. Name of Building. Tenant shall not use the name of the Building for
any purpose other than as the address of the business conducted by Tenant in the
Premises without the written consent of Landlord. Landlord reserves the right to
change the name of the Building at any time in its sole discretion by written
notice to Tenant and Landlord shall not be liable to Tenant for any loss, cost
or expense on account of any such change of name.

        42. Severability. If any provision of this Lease or the application
thereof to any person or circumstance shall be invalid or unenforceable to any
extent, the remainder of this Lease and the application of such provisions to
other persons or circumstances shall not be affected thereby and shall be
enforced to the greatest extent permitted by law.

        43. Authority. If Tenant is a corporation, partnership, trust,
association or other entity, Tenant and each person executing this Lease on
behalf of Tenant, hereby covenants and warrants that (a) Tenant is duly
incorporated or otherwise established or formed and validly existing under the
laws of its state of incorporation, establishment or formation, (b) Tenant has
and is duly qualified to do business in the state in which the Real Property is
located, (c) Tenant has full corporate, partnership, trust, association or other
appropriate power and authority to enter into this Lease and to perform all
Tenant's obligations hereunder, and (d) each person (and all of the persons if
more than one signs) signing this Lease on behalf of Tenant is duly and validly
authorized to do so.

        44. No Offer. Submission of this instrument for examination and
signature by Tenant does not constitute an offer to lease or a reservation of or
option for lease, and is not effective as a lease or otherwise until execution
and delivery by both Landlord and Tenant.

        45. Real Estate Brokers. Tenant represents and warrants that it has
negotiated this Lease directly with the real estate broker(s) identified in
Paragraph 2 and has not authorized or employed, or acted by implication to
authorize or to employ, any other real estate broker or salesman to act for
Tenant in connection with this Lease. Tenant shall indemnify, defend and hold
Landlord harmless from and against any and all Claims by any real estate broker
or salesman other than the real estate broker(s) identified in Paragraph 2 for a
commission, finder's fee or other compensation as a result of Tenant's entering
into this Lease. Landlord shall pay any commission owing to the Real Estate
Brokers identified in Paragraph 2 above pursuant to a separate agreement, and
shall indemnify, defend and hold Tenant harmless from and against any and all
Claims by such real estate brokers.

        46. Consents and Approvals. Wherever the consent, approval, judgment or
determination of Landlord is required or permitted under this Lease, Landlord
may exercise its sole discretion in granting or withholding such consent or
approval or in making such judgment or determination without reference to any
extrinsic standard of reasonableness, unless the provision providing for such
consent, approval, judgment or determination specifies that Landlord's consent
or approval is not to be unreasonably withheld, or that the standard for such
consent, approval, judgment or determination is to be reasonable, or otherwise
specifies the standards under which Landlord may withhold its consent. Whenever
Tenant requests Landlord to take any


                                       29
<PAGE>

action or give any consent or approval, Tenant shall reimburse Landlord for all
of Landlord's reasonable costs incurred in reviewing the proposed action or
consent (whether or not Landlord consents to any such proposed action),
including without limitation reasonable attorneys' or consultants' fees and
expenses, within thirty (30) days after Landlord's delivery to Tenant of a
statement of such costs. The review and/or approval by Landlord of any item
shall not impose upon Landlord any liability for accuracy or sufficiency of any
such item or the quality or suitability of such item for its intended use. Any
such review or approval is for the sole purpose of protecting Landlord's
interest in the Real Property, and neither Tenant nor any Tenant Party nor any
person or entity claiming by, through or under Tenant, nor any other third party
shall have any rights hereunder by virtue of such review and/or approval by
Landlord.

        47. Reserved Rights. Landlord retains and shall have the rights set
forth below, exercisable without notice and without liability to Tenant for
damage or injury to property, person or business and without effecting an
eviction, constructive or actual, or disturbance of Tenant's use or possession
of the Premises or giving rise to any claim for rent abatement (except as set
forth in clause (b) below):

            (a) To grant to anyone the exclusive right to conduct any business
                or render any service in or to the Building and its tenants,
                provided that such exclusive right shall not operate to require
                Tenant to use or patronize such business or service or to
                exclude Tenant from its use of the Premises expressly permitted
                herein.

            (b) Subject to the rent abatement provisions of Paragraph 17.e.
                above, to perform, or cause or permit to be performed, at any
                time and from time to time, including during Business Hours,
                construction in the common areas and facilities or other leased
                areas in the Real Property. Landlord shall use its good faith
                efforts to minimize disruption to Tenant's business caused by
                any such work, and, without limitation, Landlord shall perform
                any extraordinarily noisy or disruptive work after Business
                Hours or on weekends to the extent such procedures would be
                generally followed by managers of other first class high rise
                office buildings in the San Francisco financial district (except
                to the extent an emergency and/or Legal Requirements require
                otherwise, as reasonably determined by Landlord).

            (c) To reduce, increase, enclose or otherwise change at any time and
                from time to time the size, number, location, lay-out and nature
                of the common areas and facilities and other tenancies and
                premises in the Real Property and to create additional rentable
                areas through use or enclosure of common areas, but in no event
                shall Tenant's parking rights pursuant to Paragraph 53 below be
                diminished thereby.

        48. Financial Statements. Within thirty (30) days after Landlord's
request therefor, but not more frequently than three (3) times each calendar
year, Tenant shall furnish to Landlord, and to any lender, prospective lender,
purchaser or prospective purchaser designated by Landlord, copies of Tenant's
most recent audited financial statements reflecting Tenant's financial situation
(including without limitation balance sheets, statements of profit and loss, and
changes in financial condition), and in addition shall cause to be furnished to
Landlord similar financial statements for any guarantor(s) of this Lease. So
long as Tenant or such guarantor shall be a publicly traded entity, it may
satisfy the requirements of this Paragraph 48 by delivery of its most recent
publicly available financial statements. Landlord shall use its good faith
efforts to keep any financial statements delivered to it pursuant to this
Paragraph 48 (other than publicly available financial statements) confidential,
and shall inform any party to whom it delivers such non-public financial
statements of the confidential nature of the same. Landlord shall not deliver
any such non-public financial statements to any party which does not have a
legitimate interest in receiving the same by reason of such party's interest or
prospective interest in Landlord or the Real Property.

        49. Signage.

               a. Entrances; Building Directory. Tenant may, at Tenant's
expense, install a sign identifying Tenant's business in the elevator lobby on
each full floor of the Premises leased by Tenant, provided that the size,
location and installation requirements of the sign shall be subject to
Landlord's prior reasonable approval and all applicable Legal Requirements. Any
change to such signage shall also be subject to such approval by Landlord and
shall be made at Tenant's sole cost and expense. In addition, Tenant shall be
entitled, at no cost to Tenant, to have the name of Tenant's company listed on
(i) the Building directory situated in the lobby of the Building and (ii) the
Tenant directory in the lobby of each multi-tenant floor on which any portion of
the Premises is located. If, subsequent to the time Tenant's name is initially
listed on the directories, Tenant requests a change in Tenant's name as printed
thereon, Tenant shall pay Landlord's standard charge as in effect from time to
time for any such change.

               b. Building Lobby Signage. Tenant may, at Tenant's expense, and
upon at least thirty (30) days' prior written notice to Landlord, install a sign
displaying only the name of the Tenant originally named under this Lease, as
such name exists as of the date of this Lease, on the south wall of the main
lobby of the Embarcadero entrance to the Building and a second such sign on the
south wall of the plaza entrance to the main lobby of the Embarcadero entrance
to the Building (collectively, "Tenant's Lobby Signage").


                                       30
<PAGE>

The size, design, color, material, content, location, installation requirements
and appropriateness for a first-class office building, and conformity with the
overall design and ambiance of the Real Property of such signage, shall be
subject to Landlord's prior written approval, which approval may be withheld in
Landlord's good faith discretion, and to the other requirements of Paragraph 9
above; except that the parties agree that each such sign shall fit
proportionately within two existing adjacent horizontally placed wood panels on
such walls. Prior to installation of such signage, Tenant shall obtain all
governmental approvals and permits required in connection therewith, and Tenant
shall otherwise comply with all Legal Requirements applicable to such signage.
Upon the expiration or earlier termination of this Lease, or within thirty (30)
days after the earlier termination of Tenant's signage rights pursuant to the
following provisions of this Paragraph 49, Tenant shall, at its expense, remove
Tenant's Lobby Signage and repair and restore the affected areas of the Building
to their original condition prior to the installation of Tenant's signage.
Tenant acknowledges that its signage rights pursuant to this Paragraph 49 are
non-exclusive.

        Notwithstanding anything in this Paragraph 49 to the contrary, Tenant's
Lobby Signage rights shall forever terminate upon the date on which the Tenant
originally named under this Lease and/or such Tenant's Affiliates are not in
occupancy of an aggregate of at least forty-five thousand (45,000) rentable
square feet of space in the Building pursuant to this Lease (i.e. such Tenant
has assigned this Lease, or has sublet such portion of the Premises, to other
than its Affiliates, such that such occupancy requirement is not met). In no
event shall Tenant's Lobby Signage rights extend to Tenant's Affiliates,
notwithstanding that such Affiliates' occupancy pursuant to subleases from
Tenant may be taken into account in determining whether Tenant has met the
aforesaid occupancy requirement for Tenant's Lobby Signage rights.

        So long as Tenant's Lobby Signage rights shall remain in effect pursuant
to this Paragraph 49, Landlord shall not allow more than four (4) tenants or
other parties, in addition to Tenant, to place identification signage in the
main lobby of the Embarcadero entrance to the Building or in the plaza entrance
to such main lobby, it being acknowledged, however, that Landlord may grant each
of such four (4) tenants or other parties the right to place a total of two (2)
signs in such areas (i.e. one (1) sign in the main lobby of the Embarcadero
entrance to the Building and one (1) sign in the plaza entrance to such main
lobby).

        Nothing contained in this Paragraph 49 shall preclude any identification
signage of the owner of the Building or the Project, or any affiliate thereof,
and any such signage shall not be taken into account for purposes of determining
the number of signs allowed pursuant to the immediately preceding paragraph,
regardless of whether such owner or affiliate shall also be a tenant of the
Building or Project.

               c. Street Address Signage. At Landlord's sole cost and expense
and subject to applicable Legal Requirements, to the extent not already present
Landlord shall install (and thereafter shall maintain in place) street address
identification signage on or about the Embarcadero entrance to the Building.
Such identification shall be of such size, design, color, material and location
as Landlord shall determine. Landlord shall consult with Tenant as to such
identification and take Tenant's concerns and suggestions with respect thereto
into account, but Tenant shall not have any approval rights with respect to such
street address identification signage.

        50. Nondisclosure of Lease Terms. Tenant agrees that the terms of this
Lease are confidential and constitute proprietary information of Landlord, and
that disclosure of the terms hereof could adversely affect the ability of
Landlord to negotiate with other tenants. Tenant hereby agrees that Tenant shall
use its commercially reasonable efforts to preclude Tenant and its partners,
officers, directors, employees, agents, real estate brokers and sales persons
and attorneys from disclosing the terms of this Lease to any other person
without Landlord's prior written consent, except to any accountants of Tenant in
connection with the preparation of Tenant's financial statements or tax returns,
to an assignee of this Lease or sublessee of the Premises, or to an entity or
person (including Tenant's attorneys and other advisors) to whom disclosure is
required by applicable law or in connection with any action brought to enforce
this Lease or to assist Tenant in the interpretation of any provisions hereof or
the determination of Tenant's rights hereunder.

        51. Hazardous Substance Disclosure. California law requires landlords to
disclose to tenants the existence of certain hazardous substances. Accordingly,
the existence of gasoline and other automotive fluids, maintenance fluids,
copying fluids and other office supplies and equipment, certain construction and
finish materials, tobacco smoke, cosmetics and other personal items must be
disclosed. Gasoline and other automotive fluids are found in the garage area of
the Building. Cleaning, lubricating and hydraulic fluids used in the operation
and maintenance of the Building are found in the utility areas of the Building
not generally accessible to Building occupants or the public. Many Building
occupants use copy machines and printers with associated fluids and toners, and
pens, markers, inks, and office equipment that may contain hazardous substances.
Certain adhesives, paints and other construction materials and finishes used in
portions of the Building may contain hazardous substances. Although smoking is
prohibited in the public areas of the Building, these areas may, from time to
time, be exposed to tobacco smoke. Building occupants and other persons entering
the Building from time-to-time may use or carry prescription and
non-prescription drugs, perfumes, cosmetics and other toiletries, and foods and
beverages, some of which may contain hazardous substances. Landlord has made no
special investigation of the Premises with respect to any hazardous substances.


                                       31
<PAGE>

        52. Option to Renew.

               a. Option to Renew. Tenant shall have the option to renew this
Lease for one (1) additional term of five (5) years, commencing upon the
expiration of the initial term of this Lease. Such renewal option must be
exercised, if at all, by written notice given by Tenant to Landlord not later
than fifteen (15) months prior to the expiration of the initial term of this
Lease. Notwithstanding the foregoing, at Landlord's option this renewal option
shall be null and void and Tenant shall have no right to renew this Lease if (i)
as of the date immediately preceding the commencement of the renewal period
Tenant and/or any Affiliate of Tenant is not in occupancy of at least
sixty-seven percent (67%) of the rentable square footage of the Premises demised
pursuant to this Lease or Tenant and/or any Affiliate of Tenant does not intend
to continue to remain in such occupancy (but intends to assign this Lease or
sublet the space in whole or in part such that such occupancy requirement will
not be met), or (ii) on the date Tenant exercises the option or on the date
immediately preceding the commencement date of the renewal period an Event of
Default (or breach or default which subsequently matures into an Event of
Default) shall have occurred and be continuing under this Lease.

               b. Terms and Conditions. If Tenant exercises a renewal option,
then during the applicable renewal period all of the terms and conditions set
forth in this Lease as applicable to the Premises during the initial term shall
apply during the renewal term, except that (i) Tenant shall have no further
right to renew this Lease, (ii) Tenant shall take the Premises in their then
"as-is" state and condition for the applicable renewal period, (iii) the Base
Year for the Premises shall be the calendar year in which the renewal term
commences and the Base Tax Year for the Premises shall be the fiscal tax year in
which the renewal term commences, and (iv) the Monthly Rent payable by Tenant
for the Premises shall be the then-fair market rent for the Premises based upon
the terms of this Lease, as renewed. Fair market rent shall include the periodic
rental increases, if any, that would be included for space leased for the period
the space will be covered by the Lease. For purposes of this Paragraph 52, the
term "fair market rent" shall mean the rental rate that would be applicable for
a lease term commencing on the commencement date of the renewal term and that
would be payable in any arms length negotiations for the Premises in their then
as-is condition, for the renewal term, which rental rate may be established by
reference to rental terms actually negotiated for comparable space under primary
lease (and not sublease), taking into consideration the Base Year and Base Tax
Year with respect to the Premises as set forth above, the quality, prestige and
location of the Building and such amenities as existing improvements, view,
floors on which the Premises are situated and the like, situated in first class,
reputable, established high-rise office buildings in the San Francisco Financial
District, in sound physical and economic condition, engaged in then-prevailing
ordinary rental market practices with respect to tenant concessions (if any)
(e.g. not offering extraordinary rental, promotional deals and other concessions
to tenants which deviate from then prevailing ordinary practices in an effort to
alleviate cash flow problems, difficulties in meeting loan obligations or other
financial distress, or in response to a greater than average vacancy rate or to
entice an anchor tenant into a newly constructed building). The fair market rent
shall be mutually agreed upon by Landlord and Tenant in writing within the
thirty (30) calendar day period commencing six (6) months prior to commencement
of the renewal period. If Landlord and Tenant are unable to agree upon the fair
market monthly rent within such thirty (30)-day period, then the fair market
rent shall be established by the appraisal procedures set forth in Paragraph
52.c. below.

               c. Appraisal. Within thirty (30) days after the expiration of the
thirty (30)-day period provided in Paragraph 52.b. above for the mutual
agreement of Landlord and Tenant as to the fair market rent, each party hereto,
at its cost, shall engage a California licensed real estate broker to act on its
behalf in determining the fair market monthly rent. The brokers each shall have
at least ten (10) years' experience with leases in first-class high-rise office
buildings in the San Francisco Financial District. If a party does not appoint a
broker within such thirty (30)-day period but a broker is appointed by the other
respective party, the single broker appointed shall be the sole broker and shall
set the fair market rent. If the two brokers are appointed by the parties as
stated in this paragraph, such brokers shall meet promptly and attempt to set
the fair market rent taking into account all of the parameters set forth in
Paragraph 52.b. above. If such brokers are unable to agree within thirty (30)
days after appointment of the second broker, the brokers shall inform Landlord
and Tenant in writing of their respective determinations of the fair market rent
(each an "Initial Fair Market Rent Determination"), and shall elect a third
broker meeting the qualifications stated in this paragraph within ten (10) days
after the last date the two brokers are given to set the fair market rent. If
the two appraisers are unable to agree on a third appraiser, the third appraiser
shall be selected by the office of JAMS/ENDISPUTE located in San Francisco,
California or by such other procedure as the two appraisers shall agree. Each of
the parties hereto shall bear one-half (1/2) the cost of appointing the third
broker and of the third broker's fee. The third broker shall be a person who has
not previously acted in any capacity for either party.

               Neither Landlord nor Tenant shall advise the third broker of the
fair market rent determinations delivered by the first two brokers, and Landlord
and Tenant shall instruct the first two brokers not to advise the third broker
of such determinations. The third broker shall make his own determination of the
fair market rent within thirty (30) days of his appointment, and shall be
instructed not to advise either party or the other two brokers of his
determination except as follows: When the third broker has made his
determination, he shall so advise Landlord and Tenant and shall establish a
date, at least five (5) days after the giving of notice by the third broker to
Landlord and Tenant, on which he shall meet with the parties to


                                       32
<PAGE>

disclose his determination of the fair market rent. Such meeting shall take
place in the third broker's office unless otherwise agreed by the parties.

               If the fair market rent determined by the third broker is the
average of the determinations of the fair market rent delivered by Landlord's
broker and Tenant's broker, the third broker's determination of fair market rent
shall be the fair market rent. If such is not the case, fair market rent shall
be whichever of the Initial Fair Market Rent Determinations is closest to the
determination of fair market rent by the third broker.

               d. Minimum Rental. Notwithstanding the foregoing, in no event
shall the Monthly Rent during the renewal period be less than the aggregate of
the amounts of Monthly Rent and Additional Rent payable by Tenant (for all of
the Premises leased hereunder) under Paragraphs 2.b., 5 and 7 hereof for the
calendar month immediately preceding the commencement of the renewal period
(disregarding, for such purpose, any temporary rental abatements or reductions
then in effect).

        53. Parking. Landlord shall provide Tenant with parking for thirty (30)
automobiles in the garage of the Building, and Tenant shall pay for such parking
at Landlord's regular rate or charge from time to time in effect to tenants of
the Building for parking in the Building. Such parking is currently on an
unreserved self-park basis, but Landlord reserves the right to change such
parking to a valet basis or a reserved self-park basis, and/or return to an
unreserved self-park basis, as Landlord shall determine from time to time.
Tenant shall provide Landlord with written notice of the names of each party to
whom Tenant from time to time distributes Tenant's parking rights hereunder (all
of whom must be employees, partners, members and/or shareholders, as applicable,
of Tenant), and shall cause each such party to execute Landlord's standard
contract and waiver form for garage users. If the parking charge is not paid
when due, and such failure continues for five (5) days after notice thereof to
Tenant, then Landlord may terminate Tenant's rights under this Paragraph 53 as
to the number of spaces as to which the parking charge has not been paid in
full. The parking rights set forth in this Paragraph 53 are personal to the
Tenant originally named in this Lease, any assignee of Tenant's interests under
this Lease, and any subtenant which is an Affiliate of the Tenant originally
named in this Lease, and shall not inure to the benefit of any other party,
except that Tenant may allow approved subtenants of the Premises or any portion
thereof to use Tenant's parking rights for up to an aggregate of fifteen (15)
automobiles. Further, if at any time during the term hereof, Tenant releases to
Landlord any parking space provided for in this paragraph, then Tenant's right
under this paragraph to use such released parking space shall forever terminate.

        54. First Rights Contingency. Tenant acknowledges that Landlord's
ability to enter into this Lease is subject to the contingencies that (i)
certain rights of first offer and first refusal in favor of another tenant of
the Project are not exercised, and (ii) Landlord's lender with respect to the
Project approves this Lease. Promptly after the execution hereof, Landlord shall
send such notices and other documentation (which may include a copy of this
Lease) to such tenant and lender as shall be required to trigger the time period
during which such tenant and lender must exercise or waive its respective
rights. If such tenant shall exercise any such rights, or such lender shall not
approve this Lease, Landlord shall give Tenant prompt notice thereof
("Landlord's Termination Notice") and this Lease shall thereupon be deemed
terminated and of no force or effect. If such Tenant shall waive (or be deemed
to have waived) all such rights, and such lender shall approve (or be deemed to
have approved) this Lease, Landlord shall give Tenant prompt notice thereof
("Landlord's Ratification Notice") and this Lease shall continue in full force
and effect. Landlord's Termination Notice shall be given, if at all, within
fifteen (15) Business Days after the date of this Lease, and if not so given,
regardless of whether Landlord shall have delivered Landlord's Ratification
Notice, this Lease shall continue in full force and effect and Landlord shall
have no right to terminate this Lease pursuant to this Paragraph 54. The earlier
to occur of the date on which Landlord shall deliver Landlord's Ratification
Notice to Tenant, or the expiration of the aforesaid fifteen (15) Business Day
period without Landlord having delivered Landlord's Termination Notice to
Tenant, is referred to in this Lease as the "First Rights Contingency
Satisfaction Date."

        55. Canine Access. Notwithstanding anything to the contrary contained in
this Lease (including the Rules and Regulations), so long as the Tenant
hereunder shall remain the Tenant originally named in this Lease, or any
Affiliate of such Tenant, and such Tenant or its Affiliates shall remain in
occupancy of at least forty-five thousand (45,000) rentable square feet of space
in the Building pursuant to this Lease, Tenant shall have the right to maintain
in the Premises the Golden Retriever dog named "Blaze", owned by Mr. David
Hayden on the date hereof, the Black Labrador dog named "Scout", owned by
Shireen Piramoon on the date hereof, and a third adult dog designated by Tenant
of good temperament and training, subject to the following terms, covenants and
conditions. Tenant shall be solely responsible for such dogs, and without
limitation, Tenant's indemnification and insurance obligations set forth in
Paragraphs 14 and 15 below shall apply with respect to such dogs and any Claims
in connection therewith, and Tenant's right to maintain such dogs in the
Premises shall be subject to the provisions of the second paragraph of Paragraph
8.a. above. In no event shall any such dog be left unattended and without direct
and responsible human supervision. Tenant shall ensure that any dog waste in or
about the Building or Project is promptly picked-up and properly disposed of as
reasonably required by Landlord, all at Tenant's sole cost and expense. In the
event that any dogs permitted in the Premises pursuant to the foregoing are
determined by Landlord, in good faith, to present a risk of personal injury or
property damage to the Building or the Project, or if Landlord's lender,
insurance carriers or other tenants reasonably require that any such dogs be
removed from the


                                       33
<PAGE>

Premises or the Project, Landlord may revoke Tenant's rights pursuant to this
Paragraph 55 and Tenant shall immediately and permanently remove the offending
dog or dogs from the Premises and the Project.

        THIS LEASE IS EXECUTED by Landlord and Tenant as of the date set forth
at the top of page 1 hereof.

Landlord:                                  Tenant:

SRI HILLS PLAZA VENTURE, LLC,              CRITICAL PATH, INC.,
a Delaware limited liability company       a California corporation

By:  /s/ Douglas Shorenstein               By: /s/ William McGlashan
     -------------------------------          ---------------------------------
     Douglas W. Shorenstein
     Chairman and Chief Executive          Name:_______________________________
     Officer
                                           Title:______________________________


                                           By: /s/ Laureen DeBuono
                                              ---------------------------------

                                           Name:_______________________________

                                           Title:______________________________




                                       34
<PAGE>

                                    EXHIBIT B

                              RULES AND REGULATIONS

                                   HILLS PLAZA

        1. No sign, placard, picture, advertisement, name or notice shall be
inscribed, displayed or printed or affixed on or to any part of the outside or
inside of the Building or any part of the Premises visible from the exterior of
the Premises without the prior written consent of Landlord, which consent may be
withheld in Landlord's sole discretion. Landlord shall have the right to remove,
at Tenant's expense and without notice to Tenant, any such sign, placard,
picture, advertisement, name or notice that has not been approved by Landlord.

               All approved signs or lettering on doors and walls shall be
printed, painted, affixed or inscribed at the expense of Tenant by a person
approved of by Landlord.

               If Landlord notifies Tenant in writing that Landlord objects to
any curtains, blinds, shades or screens attached to or hung in or used in
connection with any window or door of the Premises, such use of such curtains,
blinds, shades or screens shall be removed immediately by Tenant. No awning
shall be permitted on any part of the Premises.

        2. No ice, drinking water, towel, barbering or bootblacking, shoeshining
or repair services, or other similar services shall be provided to the Premises,
except from persons authorized by Landlord and at the hours and under
regulations fixed by Landlord.

        3. The bulletin board or directory of the Building will be provided
exclusively for the display of the name and location of tenants and permitted
subtenants only and Landlord reserves the right to exclude any other names
therefrom.

        4. The sidewalks, halls, passages, exits, entrances, elevators and
stairways shall not be obstructed by any of the Tenant Parties or used by Tenant
for any purpose other than for ingress to and egress from its Premises. The
halls, passages, exits, entrances, elevators, stairways, balconies and roof are
not for the use of the general public and Landlord shall in all cases retain the
right to control and prevent access thereto by all persons whose presence in the
judgment of Landlord shall be prejudicial to the safety, character, reputation
and interests of the Building and its tenants, except that the foregoing shall
not diminish any rights of Tenant to use any such areas which are contained
within and are part of the Premises, as shown on Exhibit A to the Lease. No
tenant and no employees or invitees of any tenant shall go upon the roof of the
Building.

        5. Tenant shall not alter any lock or install any new or additional
locks or any bolts on any interior or exterior door of the Premises without the
prior written consent of Landlord.

        6. The toilet rooms, toilets, urinals, wash bowls and other apparatus
shall not be used for any purpose other than that for which they were
constructed and no foreign substance of any kind whatsoever shall be thrown
therein and the expense of any breakage, stoppage or damage resulting from the
violation of this rule shall be borne by the tenant who, or whose employees or
invitees, shall have caused it.

        7. Tenant shall not overload the floor of the Premises or mark, drive
nails, screw or drill into the partitions, woodwork or plaster or in any way
deface the Premises or any part thereof.

        8. No furniture, freight or equipment of any kind shall be brought into
the Building without the consent of Landlord and all moving of the same into or
out of the Building shall be done at such time and in such manner as Landlord
shall designate. Landlord shall have the right to prescribe the weight, size and
position of all safes and other heavy equipment brought into the Building and
also the times and manner of moving the same in and out of the Building. Safes
or other heavy objects shall, if considered necessary by Landlord, stand on a
platform of such thickness as is necessary to properly distribute the weight.
Landlord will not be responsible for loss of or damage to any such safe or
property from any cause, and all damage done to the Building by moving or
maintaining any such safe or other property shall be repaired at the expense of
Tenant. The elevator designated for freight by Landlord shall be available for
use by all tenants in the Building during the hours and pursuant to such
procedures as Landlord may determine from time to time. The persons employed to
move Tenant's equipment, material, furniture or other property in or out of the
Building must be acceptable to Landlord. The moving company must be a locally
recognized professional mover, whose primary business is the performing of
relocation services, and must be bonded and fully insured. In no event shall
Tenant employ any person or company whose presence may give rise to a labor or
other disturbance in the Real Property. A certificate or other verification of
such insurance must be received and approved by Landlord prior to the start of
any moving operations. Insurance must be sufficient in Landlord's sole opinion,
to cover all personal liability, theft or damage to the Project, including, but
not limited to, floor coverings, doors, walls, elevators, stairs, foliage and
landscaping. Special care must be taken to prevent damage to foliage and
landscaping during adverse weather. All moving operations shall be


                                       1
<PAGE>

conducted at such times and in such a manner as Landlord shall direct, and all
moving shall take place during non-business hours unless Landlord agrees in
writing otherwise.

        9. Tenant shall not employ any person or persons other than the janitor
of Landlord for the purpose of cleaning the Premises, unless otherwise agreed to
by Landlord. Except with the written consent of Landlord, no person or persons
other than those approved by Landlord shall be permitted to enter the Building
for the purpose of cleaning the Building or the Premises. Tenant shall not cause
any unnecessary labor by reason of Tenant's carelessness or indifference in the
preservation of good order and cleanliness.

        10. Tenant shall not use, keep or permit to be used or kept any foul or
noxious gas or substance in the Premises, or permit or suffer the Premises to be
occupied or used in a manner offensive or objectionable to Landlord or other
occupants of the Building by reason of noise, odors and/or vibrations, or
interfere in any way with other tenants or those having business therein, nor,
except as mandated by applicable law, shall any animals or birds be brought in
or kept in or about the Premises or the Building. In no event shall Tenant keep,
use, or permit to be used in the Premises or the Building any guns, firearm,
explosive devices or ammunition.

Notwithstanding the foregoing, Landlord acknowledges that Tenant may desire to
employ, at its sole cost and expense, a licensed and reputable security service
to supply security services within the Premises, and that Tenant may desire that
such security personnel carry firearms. Landlord will consider any request by
Tenant to allow firearms in the Premises for such purpose, but in no event shall
firearms be allowed in the Premises without Landlord's prior written consent,
which may be withheld in Landlord's good faith discretion and which may be
conditioned, without limitation, upon Tenant's delivery of such further
insurance coverages and indemnifications as Landlord shall require.

        11. No cooking shall be done or permitted by Tenant in the Premises, nor
shall the Premises be used for the storage of merchandise, for washing clothes,
for lodging, or for any improper, objectionable or immoral purposes.

               Notwithstanding the foregoing, Tenant may maintain and use in the
Premises a food preparation area with a refrigerator, microwave oven, toaster,
coffee maker and other small appliances; provided that Tenant shall (i) prevent
the emission of any food or cooking odor from leaving the Premises, (ii) be
solely responsible for cleaning the appliances and food preparation surfaces and
removing food-related waste from the Premises and the Building, or shall pay
Landlord's standard rate for such service as an addition to cleaning services
ordinarily provided, (iii) maintain and use such areas solely for Tenant's
employees and business invitees, not as public facilities, and (iv) keep the
Premises free of vermin and other pest infestation and shall exterminate, as
needed, in a manner and through contractors reasonably approved by Landlord,
preventing any emission of odors, due to extermination, from leaving the
Premises. Notwithstanding clause (ii) above, Landlord shall, without special
charge, on Business Days, empty and remove the contents of one (i) 15 gallon (or
smaller) waste container from the food preparation area so long as such
container is fully lined with, and the contents can be removed in, a waterproof
plastic liner or bag, supplied by Tenant, which will prevent any leakage of food
related waste or odors; provided, however, that if at any time Landlord must pay
a premium or special charge to Landlord's cleaning or scavenger contractors for
the handling of food-related or so-called "wet" refuse, Landlord's obligation to
provide such removal, without special charge, shall cease.

        12. Tenant shall not use or keep in the Premises or the Building any
kerosene, gasoline, or inflammable or combustible fluid or material, or use any
method of heating or air conditioning other than that supplied by Landlord.

        13. Landlord will direct electricians as to where and how telephone and
telegraph wires are to be introduced into the Premises and the Building. No
boring or cutting for wires will be allowed without the prior consent of
Landlord. The location of telephones, call boxes and other office equipment
affixed to the Premises shall be subject to the prior approval of Landlord.

        14. Upon the expiration or earlier termination of the Lease, Tenant
shall deliver to Landlord the keys of offices, rooms and toilet rooms which have
been furnished by Landlord to Tenant and any copies of such keys which Tenant
has made. In the event Tenant has lost any keys furnished by Landlord, Tenant
shall pay Landlord for such keys.

        15. Tenant shall not lay linoleum, tile, carpet or other similar floor
covering so that the same shall be affixed to the floor of the Premises, except
to the extent and in the manner approved in advance by Landlord. The expense of
repairing any damage resulting from a violation of this rule or removal of any
floor covering shall be borne by the tenant by whom, or by whose contractors,
employees or invitees, the damage shall have been caused.

        16. No furniture, packages, supplies, equipment or merchandise will be
received in the Building or carried up or down in the elevators, except between
such hours and in such elevators as shall be designated by Landlord, which
elevator usage shall be subject to the Building's customary charge therefor as
established from time to time by Landlord.


                                       2
<PAGE>

        17. On Saturdays, Sundays and legal holidays, and on other days between
the hours of 6:00 P.M. and 8:00 A.M., access to the Building, or to the halls,
corridors, elevators or stairways in the Building, or to the Premises may be
refused unless the person seeking access is known to the person or employee of
the Building in charge and has a pass or is properly identified. Landlord shall
in no case be liable for damages for any error with regard to the admission to
or exclusion from the Building of any person. In case of invasion, mob, riot,
public excitement, or other commotion, Landlord reserves the right to prevent
access to the Building during the continuance of the same by closing the doors
or otherwise, for the safety of the tenants and protection of property in the
Building.

        18. Tenant shall be responsible for insuring that the doors of the
Premises are closed and securely locked before leaving the Building and must
observe strict care and caution that all water faucets or water apparatus are
entirely shut off before Tenant or Tenant's employees leave the Building, and
that all electricity, gas or air shall likewise be carefully shut off, so as to
prevent waste or damage, and for any default or carelessness Tenant shall make
good all injuries sustained by other tenants or occupants of the Building or
Landlord. Landlord shall not be responsible to Tenant for loss of property on
the Premises, however occurring, or for any damage to the property of Tenant
caused by the employees or independent contractors of Landlord or by any other
person.

        19. Landlord reserves the right to exclude or expel from the Building
any person who, in the judgment of Landlord, is intoxicated or under the
influence of liquor or drugs, or who shall in any manner do any act in violation
of any of the rules and regulations of the Building.

        20. The requirements of any tenant will be attended to only upon
application at the office of the Building. Employees of Landlord shall not
perform any work or do anything outside of their regular duties unless under
special instructions from Landlord, and no employee will admit any person
(tenant or otherwise) to any office without specific instructions from Landlord.

        21. No vending machine or machines of any description shall be
installed, maintained or operated upon the Premises without the prior written
consent of Landlord.

        22. Subject to Tenant's right of access to the Premises in accordance
with Building security procedures, Landlord reserves the right to close and keep
locked all entrance and exit doors of the Building on Saturdays, Sundays and
legal holidays and on other days between the hours of 6:00 P.M. and 8:00 A.M.,
and during such further hours as Landlord may deem advisable for the adequate
protection of the Building and the property of its tenants.



                                        3
<PAGE>

                                    EXHIBIT C
                            FORM OF LETTER OF CREDIT

[Date]

SRI HILLS PLAZA VENTURE, LLC ("Beneficiary")
c/o SHORENSTEIN COMPANY, L.P.
555 California Street, 49th Floor
San Francisco, CA  94104
Attn: Legal Department

                IRREVOCABLE STANDBY LETTER OF CREDIT NO.________

We hereby establish our Irrevocable Letter of Credit in your favor available by
your drafts drawn on [BANK], at sight, for any sum or sum(s) not exceeding
______________ Dollars ($__________), for account of [TENANT] ("Applicant").
Draft(s) must be accompanied by supporting documents as described below:

        A written statement to [BANK] stating that "The principal amount [or the
        portion requested] of this Letter of Credit is due and payable in
        accordance with the provisions of that certain Office Lease dated
        _______________________ , between Beneficiary and Applicant."

The written statement shall be accompanied by this Letter of Credit for
surrender; provided, however, that if less than the balance of the Letter of
Credit is drawn, this Letter of Credit need not be surrendered and shall
continue in full force and effect with respect to the unused balance of this
Letter of Credit unless and until we issue to you a replacement Letter of Credit
for such unused balance, the terms of which replacement Letter of Credit shall
be identical to those set forth in this Letter of Credit. We are not required to
inquire as to the accuracy of the matters recited in the written statement or as
to the authority of the person signing the written statement and may take the
act of signing as conclusive evidence of such accuracy and his or her authority
to do so. The obligation of [BANK] under this Letter of Credit is the individual
obligation of [BANK], and is in no way contingent upon reimbursement with
respect thereto.

Each draft must bear upon its face the clause "Drawn under Letter of Credit No.
_____________ , dated ______________, of [BANK]."

This Letter of Credit shall be automatically extended for an additional period
of one year from the present or each future expiration date unless we have
notified you in writing delivered via U.S. registered mail, return receipt
requested, to your address stated above, or to such other address as you shall
have furnished to us for such purpose, not less than sixty (60) days before such
expiration date, that we elect not to renew this Letter of Credit. Upon your
receipt of such notification, you may draw your sight draft on us prior to the
then applicable expiration date for the unused balance of the Letter of Credit,
which shall be accompanied by your signed written statement that you received
notification of our election not to extend.

Except so far as otherwise expressly stated herein, this Letter of Credit is
subject to the "Uniform Customs and Practices for Documentary Credits (1993
Revision), International Chamber of Commerce - Publication No. 500." If this
Letter of Credit expires during an interruption of business as described in
article 17 of Publication 500, we hereby specifically agree to effect payment if
this Letter of Credit is drawn against within 30 days after the resumption of
business.

We hereby agree with you that drafts drawn under and in compliance with the
terms of this Letter of Credit will be duly honored if presented to the
above-mentioned drawee at our offices at [ADDRESS IN SAN FRANCISCO BAY AREA] on
or before ______________ PM [Time Zone] Time on [Initial Expiration Date], or
such later expiration date to which this Letter of Credit is extended pursuant
to the terms hereof.

If at any time Beneficiary or its authorized transferee is not in possession of
the original of this letter of credit (together with all amendments, if any)
because such original has been delivered to us as required hereunder for a draw
thereon or transfer thereof, our obligations as set forth in this letter of
credit shall continue in full force and effect as if Beneficiary or such
authorized transferee still held such original, and any previous delivery to us,
without return by us, of such original shall be deemed to have satisfied any
requirement that such original be delivered to us for a subsequent draw
hereunder or transfer hereof.

This Letter of Credit may be, without charge and without recourse, assigned to,
and shall inure to the benefit of, any successor in interest to [LANDLORD] under
the [TITLE OF DOCUMENT], provided that you deliver to [BANK] your written
request for transfer in form and substance reasonably satisfactory to [BANK].
Transfer charges, if any, are for the account of the applicant.

Sincerely,
[BANK]