Exhibit 10.1




                                BEHRINGER HARVARD
                           TIC MANAGEMENT SERVICES LP,
                         ON BEHALF OF THE OWNERS OF THE
                                COLORADO BUILDING
                                  ("LANDLORD")


                         BEHRINGER HARVARD HOLDINGS LLC,
                      A DELAWARE LIMITED LIABILITY COMPANY
                                   ("TENANT")


                                    SUITE 800


                                COLORADO BUILDING
                                WASHINGTON, D.C.
                                  OFFICE LEASE




<PAGE>

                                TABLE OF CONTENTS

1.       BASIC LEASE PROVISIONS..............................................4

2.       PROJECT.............................................................4

3.       TERM................................................................7

4.       RENT................................................................7

5.       USE & OCCUPANCY.....................................................8

6.       SERVICES & UTILITIES................................................9

7.       REPAIRS............................................................11

8.       ALTERATIONS........................................................11

9.       INSURANCE..........................................................12

10.      DAMAGE OR DESTRUCTION..............................................13

11.      INDEMNITY..........................................................14

12.      CONDEMNATION.......................................................15

13.      TENANT TRANSFERS...................................................15

14.      LANDLORD TRANSFERS.................................................17

15.      DEFAULT AND REMEDIES...............................................18

16.      SECURITY DEPOSIT...................................................20

17.      MISCELLANEOUS......................................................20


                                        i
<PAGE>

                             INDEX OF DEFINED TERMS


Additional Insured           12                 Late Charge                   8
Affiliates                   15                 Lease                         4
Alterations                  11                 Leasehold Improvements        6
Base Building                 5                 Liability Limit               5
Base Rent                     4                 Mechanical Systems            6
Base Year                     4                 Month                         7
Billing Address               5                 New Premises                 20
Brokers                       5                 NLT                           7
Building                      4                 Notice Addresses              4
Building Standard             6                 Permitted Transferee         16
Building Structure            5                 Premises                      4
Business Hours                5                 Project                       5
Claims                       14                 Rent                          8
Commencement Date             7                 Repair Estimate              13
Common Areas                  6                 Scheduled Commencement Date   4
Construction Allowance        5                 Scheduled Term                4
Date                          4                 Security Deposit              4
Default Rate                 19                 Standard Services             9
Design Problem               11                 Successor Landlord           17
Encumbrance                  17                 Taking                       15
Expiration Date               7                 Telecommunication Services   10
Force Majeure                20                 Tenant                        4
Hazardous Materials           8                 Tenant Default               18
Holdover                      7                 Tenant's Personal Property    6
Holidays                      5                 Tenant's Share                4
HVAC                          9                 Tenant's Wiring              10
Interruption Estimate        13                 Term                          7
Land                          5                 Transfer                     15
Landlord                      4                 Use                           4


                                       iii

<PAGE>

                                      LEASE

        Landlord and Tenant enter into this Lease ("Lease") as of the Execution
Date on the following terms, covenants, conditions and provisions:

1.      BASIC LEASE PROVISIONS

        1.1     BASIC LEASE DEFINITIONS. In this Lease, the following defined
terms have the meanings indicated.

<TABLE>
<CAPTION>
<S>                                                                             <C>
        (a)     Execution Date:         November 7, 2005.

        (b)     Landlord:               BEHRINGER HARVARD TIC MANAGEMENT SERVICES LP,  a Texas
                                        limited  partnership, as agent for the owners

        (c)     Tenant:                 Behringer Harvard Holdings LLC, a  Delaware Limited Liability Company

        (d)     Building:               COLORADO BUILDING
                                        1341 G Street, N.W., Washington, D.C. 20005
                                        deemed to contain: 127,600 rentable square feet ("RSF")

        (e)     Premises:               Suite 800 (identified on Exhibit A), located on the 8th floor of the Building and
                                        deemed to contain: 11,131 RSF

        (f)     Use:                    General administrative non-governmental office use consistent with that of a
                                        first-class office building.

        (g)     Scheduled Term:         6 months.

        (h)     Scheduled Commencement
                Date:                   July 1, 2005.

        (i)     Base Rent:              The following amounts payable in accordance with Article 4:

                ----------------------- ------------------------------ ---------------------- ----------------------------
                          MONTHS              ANNUAL RATE PER RSF         ANNUAL BASE RENT         MONTHLY BASE RENT
                ----------------------- ------------------------------ ---------------------- ----------------------------
                          1 - 6                     $32.34                  $360,000.00                $30,000.00
                ----------------------- ------------------------------ ---------------------- ----------------------------

                ----------------------- ------------------------------ ---------------------- ----------------------------

                ----------------------- ------------------------------ ---------------------- ----------------------------

                ----------------------- ------------------------------ ---------------------- ----------------------------

                ----------------------- ------------------------------ ---------------------- ----------------------------

        (j)     Tenant's Share:         n/a
        (k)     Base Year:              n/a
        (l)     Security Deposit:       n/a
        (m)     Notice Address:         For each party, the following address(es):

                ------------------------------------------------------- --------------------------------------------------
                                       TO LANDLORD                                          TO TENANT
                ------------------------------------------------------- --------------------------------------------------
                Behringer Harvard TIC Management Services LP            Before the Commencement Date:
                15601 Dallas Parkway                                    Behringer Harvard Holdings
                Suite 600                                               15601 Dallas Parkway
                Addison, Texas  75001                                   Suite 600
                Attn: Mr. Terry Kennon                                  Addison, Texas 75001
                                                                        Attn: Gerald Reihsen
                ------------------------------------------------------- --------------------------------------------------
</TABLE>


                                       4
<PAGE>
<TABLE>
<CAPTION>
<S>                                                                             <C>
                ------------------------------------------------------- --------------------------------------------------
                and a copy of notices of default to:                    After the Commencement Date:

                Trammell Crow Company                                   Behringer Harvard Holdings
                1055 Thomas Jefferson Street, NW                        15601 Dallas Parkway
                Sixth Floor                                             Suite 600
                Washington, D.C. 20007                                  Addison, Texas 75001
                Attn: Property Manager, The Colorado Building           Attn: Gerald Reihsen

                ------------------------------------------------------- --------------------------------------------------

                ------------------------------------------------------- --------------------------------------------------


        (n)     Billing Address:        For each party, the following address:
                ------------------------------------------------------- --------------------------------------------------
                For Landlord                                            For Tenant
                ------------------------------------------------------- --------------------------------------------------
                Behringer Harvard TIC Management Services LP 15601      Behringer Harvard Holdings
                Dallas Parkway                                          15601 Dallas Parkway
                Suite 600                                               Suite 600
                Addison, Texas  75001                                   Addison, Texas 75001
                Attn: Mr. Terry Kennon                                  Attn:  Gerald Reihsen
                ------------------------------------------------------- --------------------------------------------------

        (o)     Brokers:                Landlord's Broker is n/a, whose rights to a commission shall be provided by a
                                        separate agreement with Landlord.

                                        Tenant's Broker is n/a, whose rights to a commission shall be provided by a
                                        separate agreement with n/a.

        (p)     Parking Allotment:      1 permit per 1200 RSF of Premises.
        (q)     Liability Limit:        n/a
        (r)     Construction Allowance: n/a
        (s)     Business Hours:         From 8:00 a.m. to 7:00 p.m. on Monday through Friday and from 9:00 a.m. to 1:00 p.m.
                                        on Saturday, excepting: New Year's Day, Memorial Day, Independence Day, Labor Day,
                                        Thanksgiving Day, Christmas Day, President's Day, Columbus Day, Veteran's Day, and
                                        Martin Luther King Day ("Holidays").
</TABLE>

2.      PROJECT

        2.1     PROJECT. The Land, Building, Common Areas and Premises (as
defined in ss.1 and below) are collectively referred to as the "Project."

        2.2     LAND. "Land" means the real property on which the Project,
Building and Common Areas are located, and all other leaseholds, easements or
other interests owned by Landlord in connection with the Project, Building or
Common Areas., whether Landlord's interest in the Land is in fee or is a
leasehold. The Land is subject to expansion or reduction after the Execution
Date.

        2.3     BASE BUILDING. "Base Building" means Building Structure and
Mechanical Systems, collectively, defined as follows:

        (a)     BUILDING STRUCTURE. "Building Structure" means the foundations,
                floor/ceiling slabs, roofs, exterior walls, exterior glass and
                mullions, columns, beams, shafts (including elevator shafts),
                stairs, stairwells, elevators, Building mechanical, electrical
                and telephone closets, Common Areas, public areas, and any other
                structural components in the Building. The Building Structure
                excludes the Leasehold Improvements (and similar improvements to
                other premises) and the Mechanical Systems.


                                       5
<PAGE>

        (b)     MECHANICAL SYSTEMS. "Mechanical Systems" means the mechanical,
                electronic, physical or informational systems generally serving
                the Building or Common Areas, including the sprinkler, plumbing,
                heating, ventilating, air conditioning, lighting,
                communications, security, drainage, sewage, waste disposal,
                vertical transportation, fire/life safety systems.

        2.4     COMMON AREAS. Tenant will have a non-exclusive right to use the
Common Areas subject to the terms of this Lease. "Common Areas" means those
interior and exterior common and public areas on the Land and in the Building
(and appurtenant easements) designated by Landlord for the non-exclusive use by
Tenant in common with Landlord, other tenants and occupants, and their
employees, agents and invitees, including any parking facilities serving the
Building that are owned or leased by Landlord.

        2.5     PREMISES. Landlord leases to Tenant the Premises subject to the
terms of this Lease. Except as provided elsewhere in this Lease, by taking
possession of the Premises Tenant accepts the Premises in its "as is" condition
and with all faults, and the Premises is deemed in good order, condition, and
repair. The Premises includes the Leasehold Improvements and excludes certain
areas, facilities and systems, as follows:

        (a)     LEASEHOLD IMPROVEMENTS. "Leasehold Improvements" means all
                non-structural improvements in the Premises or exclusively
                serving the Premises, and any structural improvements to the
                Building made to accommodate Tenant's particular use of the
                Premises. The Leasehold Improvements may exist in the Premises
                as of the Execution Date, or be installed by Landlord or Tenant
                under this Lease at the cost of either party. The Leasehold
                Improvements include: (1) interior walls and partitions
                (including those surrounding structural columns entirely or
                partly within the Premises); (2) the interior one-half of walls
                that separate the Premises from adjacent areas designated for
                leasing; (3) the interior drywall on exterior structural walls,
                and walls that separate the Premises from the Common Areas
                (defined below); (4) stairways and stairwells connecting parts
                of the Premises on different floors, except those required for
                emergency exiting; (5) the frames, casements, doors, windows and
                openings installed in or on the improvements described in (1-4),
                or that provide entry/exit to/from the Premises; (6) all
                hardware, fixtures, cabinetry, railings, paneling, woodwork and
                finishes in the Premises or that are installed in or on the
                improvements described in (1-5); (7) if any part of the Premises
                is on the ground floor, the ground floor exterior windows
                (including mullions, frames and glass); (8) integrated ceiling
                systems (including grid, panels and lighting); (9) carpeting and
                other floor finishes; (10) kitchen, rest room, lavatory or other
                similar facilities that exclusively serve the Premises
                (including plumbing fixtures, toilets, sinks and built-in
                appliances); and (11) the sprinkler, plumbing, heating,
                ventilating, air conditioning, lighting, communications,
                security, drainage, sewage, waste disposal, vertical
                transportation, fire/life safety, and other mechanical,
                electronic, physical or informational systems that exclusively
                serve the Premises, including the parts of each system that are
                connected to the Mechanical Systems (defined below) from the
                common point of distribution for each system to and throughout
                the Premises.

        (b)     EXCLUSIONS FROM THE PREMISES. The Premises does not include: (1)
                any areas above the finished ceiling or integrated ceiling
                systems, or below the finished floor coverings that are not part
                of the Leasehold Improvements, (2) janitor's closets, (3)
                stairways and stairwells to be used for emergency exiting or as
                Common Areas, (4) rooms for Mechanical Systems or connection of
                telecommunications equipment, (5) vertical transportation
                shafts, (6) vertical or horizontal shafts, risers, chases, flues
                or ducts, and (7) any easements or rights to natural light, air
                or view.

        2.6     BUILDING STANDARD. "Building Standard" means the minimum or
exclusive type, brand, quality or quantity of materials Landlord designates for
use in the Building from time to time.

        2.7     TENANT'S PERSONAL PROPERTY. "Tenant's Personal Property" means
those trade fixtures, furnishings, equipment, work product, inventory,
stock-in-trade and other personal property of Tenant that are not permanently
affixed to the Project in a way that they become a part of the Project and will
not, if removed, impair the value of the Leasehold Improvements that Tenant is
required to deliver to Landlord at the end of the Term under ss.3.3.


                                       6
<PAGE>

3.      TERM

        3.1     TERM. "Term" means the period that begins on the Commencement
Date and ends on the Expiration Date, subject to renewal, extension or earlier
termination as may be further provided in this Lease. "Month" means a full
calendar month of the Term.

        (a)     COMMENCEMENT DATE. The "Commencement Date" means the date that
                is the earlier of:

                (1)     The day that Tenant first conducts business in any part
                        of the Premises; or

                (2)     The day that Landlord tenders the Premises to Tenant
                        with Landlord's Work substantially complete or that date
                        that Landlord would have tendered possession of the
                        Premises but for Tenant Delay. If Landlord fails to
                        tender possession of the Premises to Tenant by the
                        Scheduled Commencement Date due to Tenant Delay or Force
                        Majeure, Landlord will not be in default of this Lease.

        (b)     EXPIRATION DATE. "Expiration Date" means the date that is the
                last day of the Scheduled Term (plus that many additional days
                required for the Expiration Date to be the last day of a
                calendar month) after the later of:

                (1)     The Scheduled Commencement Date, or

                (2)     The Commencement Date.

        (c)     EARLY OCCUPANCY. Tenant may not enter the Premises for any
                purpose until Landlord tenders the Premises to Tenant. If Tenant
                conducts business in any part of the Premises before the
                Scheduled Commencement Date, Base Rent for that period will be
                paid by Tenant at the rate for the first Month that Base Rent
                and Additional Rent is due and not discounted, excused or free.

        (d)     CONFIRMATION OF TERM. Landlord shall notify Tenant of the
                Commencement Date using a Notice of Lease Term ("NLT") in the
                form attached to this Lease as Exhibit C. Tenant shall execute
                and deliver to Landlord the NLT within 10 business days after
                its receipt, but Tenant's failure to do so will not reduce
                Tenant's obligations or Landlord's rights under this Lease.

        3.2     HOLDOVER. If Tenant keeps possession of the Premises after the
end of the Term (a "Holdover") without Landlord's prior written consent (which
may be withheld in its sole discretion), then in addition to the remedies
available elsewhere under this Lease or by Law, Tenant will be a tenant at
sufferance and must comply with all of Tenant's obligations under this Lease,
except that during the Holdover Tenant will pay 200% of the monthly Base Rent
and Additional Rent last payable under this Lease, without prorating for any
partial month of Holdover. Tenant shall indemnify and defend Landlord from and
against all claims and damages, both consequential and direct, that Landlord
suffers due to Tenant's failure to return possession of the Premises to Landlord
at the end of the Term. Landlord's deposit of Tenant's Holdover payment will not
constitute Landlord's consent to a Holdover, or create or renew any tenancy.

        3.3     CONDITION ON EXPIRATION. By the end of the Term, Tenant will
return possession of the Premises to Landlord vacant, free of Tenant's Personal
Property, in broom-clean condition, and with all Leasehold Improvements in good
working order and repair (excepting ordinary wear and tear), except that Tenant
will remove Tenant's Wiring and those Leasehold Improvements and Alterations
that, when approved by Landlord, were required to be removed at the end of the
Term. If Tenant fails to return possession of the Premises to Landlord in this
condition, Tenant shall reimburse Landlord for the costs incurred to put the
Premises in the condition required under this ss.3.3, including Landlord's
standard administration fee. Tenant's Personal Property left behind in the
Premises after the end of the Term will be considered abandoned and Landlord may
move, store, retain or dispose of these items at Tenant's cost, including
Landlord's standard administration fee.

4.      RENT

        4.1     BASE RENT. Tenant shall prepay 1 month's installment of Base
Rent by the Execution Date, to be applied against Base Rent first due under this
Lease. During the Term, Tenant shall pay all other Base Rent in advance, in
monthly installments, on the 1st of each calendar month. Base Rent for any
partial month will be prorated.

        4.2     ADDITIONAL RENT. INTENTIONALLY DELETED


                                       7
<PAGE>

        4.3     OTHER TAXES. INTENTIONALLY DELETED

        4.4     TERMS OF PAYMENT. "Rent" means all amounts payable by Tenant
under this Lease and the Exhibits, including Base Rent. If a time for payment of
an item of Rent is not specified in this Lease, then Tenant will pay Rent within
30 days after receipt of Landlord's statement or invoice. Unless otherwise
provided in this Lease, Tenant shall pay Rent without notice, demand, deduction,
abatement or setoff, in lawful U.S. currency, at Landlord's Billing Address.
Landlord will send invoices payable by Tenant to Tenant's Billing Address;
however, neither Landlord's failure to send an invoice nor Tenant's failure to
receive an invoice for Base Rent (and installments of Estimated Additional Rent)
will relieve Tenant of its obligation to timely pay Base Rent (and installments
of Estimated Additional Rent). Each partial payment by Tenant shall be deemed a
payment on account; and, no endorsement or statement on any check or any
accompanying letter shall constitute an accord and satisfaction, or affect
Landlord's right to collect the full amount due. No payment by Tenant to
Landlord will be deemed to extend the Term or render any notice, pending suit or
judgment ineffective. By notice to the other, each party may change its Billing
Address.

        4.5     LATE PAYMENT. If Landlord does not receive all or part of any
item of Rent when due, then Tenant shall pay Landlord a "Late Charge" of 5% of
the overdue amount. Tenant agrees that the Late Charge is not a penalty, and
will compensate Landlord for costs not contemplated under this Lease that are
impracticable or extremely difficult to fix. Landlord's acceptance of a Late
Charge does not waive Tenant's default.

5.      USE & OCCUPANCY

        5.1     USE. Tenant shall use and occupy the Premises only for the Use.
Landlord does not represent or warrant that the Project is suitable for the
conduct of Tenant's particular business.

        5.2     COMPLIANCE WITH LAWS AND DIRECTIVES.

        (a)     TENANT'S COMPLIANCE. Subject to the remaining terms of this
                Lease, Tenant shall comply at Tenant's expense with all
                directives of Landlord's insurers or laws concerning:

                (1)     The Leasehold Improvements and Alterations,

                (2)     Tenant's use or occupancy of the Premises,

                (3)     Tenant's employer/employee obligations,

                (4)     A condition created by Tenant,

                (5)     Tenant's failure to comply with this Lease or its
                        invitees,

                (6)     The negligence of Tenant, the Tenant Parties, or
                        Tenant's Affiliates or contractors, or

                (7)     Any chemical wastes, contaminants, pollutants or
                        substances that are hazardous, toxic, infectious,
                        flammable or dangerous, or regulated by any local, state
                        or federal statute, rule, regulation or ordinance for
                        the protection of health or the environment ("Hazardous
                        Materials") that are introduced to the Project, handled
                        or disposed by Tenant or its Affiliates, or any of their
                        contractors.

        (b)     LANDLORD'S COMPLIANCE. Subject to the remaining terms of this
                Lease, Landlord shall comply at Landlord's cost with all
                directives of Landlord's insurers or laws concerning the Project
                other than those that are Tenant's obligation under subsection
                (a). The costs of compliance under this subsection (b) will be
                included in Expenses to the extent allowed under ss.4.2.

        5.3     OCCUPANCY. Tenant shall not interfere with Building services or
other tenants' rights to quietly enjoy their respective premises or the Common
Areas. Tenant shall not make or continue any nuisance, including any
objectionable odor, noise, fire hazard, vibration, or wireless or
electromagnetic transmission. Tenant's will not maintain any Leasehold
Improvements or use the Premises in a way that increases the cost of insurance
required under ss.9.2, or requires insurance in addition to the coverage
required under ss.9.2.

        5.4     PROHIBITED PERSONS AND TRANSACTIONS. Tenant represents and
warrants to Landlord that (a) Tenant is currently in compliance with and shall
at all times during the Scheduled Term (including any extension thereof) remain
in compliance with the regulations of the Office of Foreign Asset Control
("OFAC") of the Department of the Treasury (including those named on the OFAC's
Specially Designated and Blocked Persons List)


                                       8
<PAGE>

and any statute, executive order (including the September 24, 2001, Executive
Order No. 13224 Blocking Property and Prohibiting Transactions with Persons Who
Commit, Threaten to Commit or Support Terrorism (the "Executive Order")), or
other governmental action relating thereto; and (b) Tenant is not, and will not
be, a person with whom Landlord is restricted from doing business under the
Uniting and Strengthening America by Providing Appropriate Tools Required to
Intercept and Obstruct Terrorism Act of 2001 (USA Patriot Act), H. R. 3152,
Public Law 107-56 and the Executive Order and the regulations promulgated
thereunder and including persons and entities named on the OFAC Specially
Designated Nations and Blocked Persons List.

6.      SERVICES & UTILITIES

        6.1     STANDARD SERVICES.

        (a)     STANDARD SERVICES DEFINED. "Standard Services" means:

                (1)     Heating, ventilation and air-conditioning ("HVAC")
                        during Business Hours as reasonably required to
                        comfortably use and occupy the Premises and interior
                        Common Areas;

                (2)     Tempered water from the public utility for use in Common
                        Areas rest rooms;

                (3)     Janitorial services to the Premises and interior Common
                        Areas 5 days a week, except Holidays, to the extent
                        reasonably determined by Landlord;

                (4)     Access to the Premises (by at least 1 passenger elevator
                        if not on the ground floor);

                (5)     Building standard bulbs are provided to Tenant,
                        specialty bulbs will be billed to Tenant;

                (6)     Labor to replace fluorescent tubes and ballasts in
                        Building Standard light fixtures in the Premises; and

                (7)     Electricity from Landlord's selected provider(s) for
                        Common Areas lighting, Building Standard light fixtures
                        in the Premises and to convenience outlets in the
                        Premises for the operation of customary quantities and
                        types of office equipment, however, the connected load
                        does not exceed two and one-half (2.5) watts per
                        rentable square foot of the Premises during Business
                        Hours on an annual basis.

        (b)     STANDARD SERVICES PROVIDED. During the Term, Landlord provides
                the Standard Services to Tenant. The cost of the Standard
                Services is included in Expenses. Landlord is not responsible
                for any inability to provide Standard Services due to either:
                the concentration of personnel or equipment in the Premises; or
                Tenant's use of equipment in the Premises that is not customary
                office equipment, has special cooling requirements, or generates
                heat.

        6.2     ADDITIONAL SERVICES. Unless Tenant obtains Landlord's prior
written consent, Tenant will not use utilities or services in excess of the
Standard Services. If Landlord so consents, Landlord may provide utilities and
services in excess of the Standard Services subject to the following however, if
Tenant shall fail to pay for such Additional Services, in addition to Landlord's
other remedies under the Lease, Landlord may discontinue the Additional
Services:

        (a)     HVAC. If Tenant requests HVAC service to the Premises during
                non-Business Hours, Tenant will give Landlord at least 24 hour
                notice of same, and Tenant will pay as Rent Landlord's scheduled
                rate for this service.

        (b)     LIGHTING. Landlord will furnish both Building Standard and
                non-Building Standard lamps, bulbs, ballasts and starters that
                are part of the Leasehold Improvements for purchase by Tenant at
                Landlord's cost, plus Landlord's standard administration fee.
                Landlord will install non-Building Standard items at Landlord's
                scheduled rate for this service.

        (c)     OTHER UTILITIES AND SERVICES. Tenant will pay as Rent the actual
                cost of utilities or services (other than HVAC and lighting
                addressed in (a) and (b)) either used by Tenant or provided at
                Tenant's request in excess of that provided as part of the
                Standard Services, plus Landlord's standard administration fee.
                Tenant's excess consumption may be estimated by Landlord unless
                either Landlord requires or Tenant elects to install Building
                Standard meters to measure Tenant's consumption.


                                       9
<PAGE>

        (d)     ADDITIONAL SYSTEMS AND METERING. Landlord may require Tenant, at
                Tenant's expense, to upgrade or modify existing Mechanical
                Systems serving the Premises or the Leasehold Improvements to
                the extent necessary to meet Tenant's excess requirements
                (including installation of Building Standard meters to measure
                the same).

        6.3     ALTERNATE ELECTRICAL BILLING. Landlord may elect at any time
during the Term after the Base Year, and continuing for the remainder of the
Term, to separately meter Tenant's total consumption of electricity in the
Premises, including lighting and convenience outlets. If Landlord so elects,
then Landlord shall notify Tenant of such election and in lieu of including
consumption of electricity of tenanted premises in Expenses, Tenant shall pay to
Landlord as Rent the actual cost of Tenant's electricity consumption to the
extent that it exceeds Tenant's Proportional Share of the consumption of
electricity of tenanted premises in the Base Year (as reasonably estimated by
Landlord if this consumption was not then separately metered), plus Landlord's
standard administration fee.

        6.4     TELECOMMUNICATIONS SERVICES. Tenant will contract directly with
third party providers and will be solely responsible for paying for all
telephone, data transmission, video and other telecommunication services
("Telecommunication Services") subject to the following:

        (a)     PROVIDERS. Each Telecommunications Services provider that does
                not already provide service to the Building shall be subject to
                Landlord's approval, which Landlord may withhold in Landlord's
                sole discretion. Without liability to Tenant, the license of any
                Telecommunications Services provider servicing the Building may
                be terminated under the terms of the license, or not renewed
                upon the expiration of the license.

        (b)     TENANT'S WIRING. Landlord may, in its sole discretion, designate
                the location of all wires, cables, fibers, equipment, and
                connections ("Tenant's Wiring") for Tenant's Telecommunications
                Services, restrict and control access to telephone cabinets and
                rooms. Tenant may not use or access the Base Building, Common
                Areas or roof for Tenant's Wiring without Landlord's prior
                written consent, which Landlord may withhold in Landlord's sole
                discretion, or for which Landlord may charge a fee determined by
                Landlord.

        (c)     This ss.6.4 is solely for Tenant's benefit, and no one else
                shall be considered a third party beneficiary of these
                provisions.

        6.5     INTERRUPTION OF SERVICES.

        (a)     Without breaching the Lease, Landlord may:

                (1)     Comply with laws or voluntary government or industry
                        guidelines concerning the services to be provided by
                        Landlord or obtained by Tenant under this Article 6;

                (2)     Interrupt, limit or discontinue the services to be
                        provided by Landlord or obtained by Tenant under this
                        Article 6 as may be reasonably required during an
                        emergency or Force Majeure event; or

                (3)     If Landlord gives Tenant reasonable prior notice and
                        uses commercially reasonable efforts not to disturb
                        Tenant's use of the Premises for the Use, interrupt,
                        limit or discontinue the services to be provided by
                        Landlord or obtained by Tenant under this Article 6 to
                        repair and maintain the Project under ss.7.2, or make
                        any improvements or changes to the Project.

        (b)     ABATEMENT FOR INTERRUPTION OF STANDARD SERVICES. If all or a
                part of the Premises is untenantable because of an interruption
                in a utility service that prevents Landlord from providing any
                of the Standard Services for more than (7) seven consecutive
                days, then from the 8th consecutive day of interruption until
                the Standard Services are restored, Landlord shall abate
                Tenant's Base Rent and Additional Rent, subject to the
                following:

                (1)     Landlord will only abate Base Rent and Additional Rent
                        to the extent the Premises are untenantable and not
                        actually used by Tenant to conduct business;

                (2)     Landlord will only abate Base Rent and Additional Rent
                        if the interruption of Standard Services is within
                        Landlord's reasonable control to remedy; and


                                       10
<PAGE>

                (3)     Landlord will only abate Base Rent and Additional Rent
                        to the extent the interruption in Base Rent and
                        Additional Rent covered by insurance Landlord must
                        maintain under ss.9.2; and

        (c)     NO OTHER LIABILITY. Except as provided under (b), Landlord will
                not be liable in any manner for any interruption in services to
                be provided by Landlord or obtained by Tenant under this Article
                6 (including damage to Tenant's Personal Property, consequential
                damages, actual or constructive eviction, or abatement of any
                other item of Rent).

        6.6     RECYCLING. Tenant covenants and agrees, at its sole cost and
expense, to comply with all present and future laws, orders, and regulations of
the jurisdiction in which the Building is located and of the federal, municipal,
and local governments, departments, commissions, agencies and boards having
jurisdiction over the Building to the extent that they or this Lease impose on
Tenant duties and responsibilities regarding the collection, sorting,
separation, and recycling of trash. Tenant shall pay all costs, expenses, fines,
penalties, or damages that may be imposed on Landlord or Tenant by reason of
Tenant's failure to comply with the provisions of this Section 6.6., and, at
Tenant's sole cost and expense, shall indemnify, defend and hold Landlord
harmless (including legal fees and expenses) from and against any actions,
claims, and suits arising from such noncompliance, using counsel reasonably
satisfactory to Landlord.

7.      REPAIRS

        7.1     TENANT'S REPAIRS. Except as provided in Articles 10 and 12,
during the Term Tenant shall, at Tenant's cost, repair and maintain (and
replace, as necessary) the Leasehold Improvements and keep the Premises in good
order and condition. Tenant's work under this ss.7.1 (a) is subject to the prior
approval and supervision of Landlord, (b) must be performed in compliance with
laws and Building rules and regulations, and (c) must be performed in a
first-class, lien free and workmanlike manner, using materials not less than
Building Standard.

        7.2     LANDLORD'S REPAIRS. Except as provided in Articles 10 and 12,
during the Term Landlord shall, at Landlord's cost (but included as Expenses to
the extent provided in ss.4.2) repair and maintain (and replace, as necessary)
all parts of the Project that are not Tenant's responsibility to repair and
maintain under ss.7.1 (or any other tenant's responsibility under their
respective lease) and keep the Project in good order and condition according to
the standards prevailing for comparable office buildings in the area in which
the Building is located. Tenant may not repair or maintain the Project on
Landlord's behalf or offset any Rent for any repair or maintenance of the
Project that is undertaken by Tenant.

8.      ALTERATIONS

        8.1     ALTERATIONS BY TENANT. "Alterations" means any modifications,
additions or improvements to the Premises or Leasehold Improvements made by
Tenant during the Term, including modifications to the Base Building or Common
Areas required by law as a condition of performing the this work. Alterations
does not include Tenant Improvements made under any Workletter attached to this
Lease. Alterations are made at Tenant's sole cost and expense, subject to the
following:

        (a)     CONSENT REQUIRED. All Alterations require Landlord's prior
                written consent. If a Design Problem exists, Landlord may
                withhold its consent in Landlord's sole discretion; otherwise,
                Landlord will not unreasonably withhold its consent. In either
                case, Landlord may condition its consent to any item of
                Alterations on the requirement that Tenant remove this item of
                Alterations upon termination of this Lease. "Design Problem"
                means a condition that results, or will result, from Alterations
                that are proposed, being performed or have been completed that
                either:

                (1)     Does not comply with laws;

                (2)     Does not meet or exceed the Building Standard;

                (3)     Exceeds the capacity, adversely affects, is incompatible
                        with, or impairs Landlord's ability to maintain,
                        operate, alter, modify or improve the Base Building;

                (4)     Affects the exterior appearance of the Building or
                        Common Areas;

                (5)     Violates any agreement affecting the Project;

                (6)     Costs more to demolish than Building Standard
                        improvements;


                                       11
<PAGE>

                (7)     Violates any insurance regulations or standards for a
                        fire-resistive office building; or

                (8)     Locates any equipment, Tenant's Wiring or Tenant's
                        Personal Property on the roof of the Building, in Common
                        Areas or in telecommunications or electrical closets.

        (b)     PERFORMANCE OF ALTERATIONS. Alterations shall be performed by
                Tenant in a good and workman-like manner according to plans and
                specifications approved by Landlord. All Alterations shall
                comply with law and insurance requirements. Landlord's
                designated contractors must perform Alterations affecting the
                Base Building or Mechanical Systems; and, all other work will be
                performed by qualified contractors that meet Landlord's
                insurance requirements and are otherwise approved by Landlord.
                Promptly after completing Alterations, Tenant will deliver to
                Landlord "as-built" CADD plans, proof of payment, a copy of the
                recorded notice of completion, and all unconditional lien
                releases.

        (c)     BONDING. If requested by Landlord, before commencing Alterations
                Tenant shall at Tenant's cost obtain bonds, or deposit with
                Landlord other security acceptable to Landlord for the payment
                and completion of the Alterations. These bonds or other security
                shall be in form and amount acceptable to Landlord.

        (d)     ALTERATIONS FEE. Tenant shall pay Landlord as Rent 10% of the
                total construction costs of the Alterations to cover review of
                Tenant's plans and construction coordination by its own
                employees. In addition, Tenant shall reimburse Landlord for the
                actual cost that Landlord reasonably incurs to have engineers,
                architects or other professional consultants review Tenant's
                plans and work in progress, or inspect the completed
                Alterations.

        8.2     ALTERATIONS BY LANDLORD. Landlord may make any modifications,
additions, renovations or improvements to the Project that Landlord deems
appropriate, provided Landlord uses commercially reasonable efforts to avoid
disrupting Tenant's business.

        8.3     LIENS AND DISPUTES. Tenant will keep title to the Land and
Building free of any liens concerning the Leasehold Improvements, Alterations,
or Tenant's Personal Property, and will promptly take whatever action is
required to have any of these liens released and removed of record (including,
as necessary, posting a bond or other deposit). To the extent legally permitted,
each contract and subcontract for Alterations will provide that no lien attaches
to or may be claimed against the Project other than Tenant's leasehold interest
in the Premises.

9.      INSURANCE

        9.1     TENANT'S INSURANCE.

        (a)     TENANT'S COVERAGE. Before taking possession of the Premises for
                any purpose (including construction of Tenant Improvements, if
                any) and during the Term, Tenant will provide and keep in force
                the following coverage:

                (1)     Commercial general liability insurance insuring Tenant's
                        use and occupancy of the Premises and Common Areas, and
                        covering personal and bodily injury, death, and damage
                        to others' property of not less than the Liability
                        Limit. Each of these policies shall include cross
                        liability and severability of interests clauses, and be
                        written on an occurrence, and not claims-made, basis.
                        Each of these policies shall name Landlord, the Building
                        property manager, each secured lender, and any other
                        party reasonably designated by Landlord as an additional
                        insured ("Additional Insured").

                (2)     All risk insurance (including standard extended coverage
                        endorsement perils, leakage from fire protective devices
                        and other water damage) covering the full replacement
                        cost of the Leasehold Improvements and Tenant's Personal
                        Property. Each of these policies shall name Landlord and
                        each Additional Insured an additional insured to the
                        extent of their interest in the Leasehold Improvements.
                        Each of these policies shall include a provision or
                        endorsement in which the insurer waives its right of
                        subrogation against Landlord and each Additional
                        Insured.

                (3)     Insurance covering the perils described in (2) for
                        Tenant's loss of income or insurable gross profits with
                        a limit not less than Tenant's annual Rent. Each of
                        these policies shall


                                       12
<PAGE>

                        include a provision or endorsement in which the insurer
                        waives its right of subrogation against Landlord and
                        each Additional Insured.

                (4)     If any boiler or machinery is operated in the Premises,
                        boiler and machinery insurance.

                (5)     Insurance required by law, including workers'
                        compensation insurance.

                (6)     Employers liability insurance with limits not less than
                        $1 million.

                (7)     Commercial automobile liability insurance covering all
                        owned, hired, and non-owned vehicles with a combined
                        single limit of not less than $1 million for each
                        accident or person.

                (8)     Insurance covering the Leasehold Improvements and
                        Tenant's Personal Property against loss or damage due to
                        earthquake or difference in condition. Tenant may elect
                        to self-insure this coverage. If Tenant does not elect
                        to self-insure this coverage, then each of these
                        policies shall name Landlord and each Additional Insured
                        an additional insured to the extent of their interest in
                        the Leasehold Improvements.

        (b)     INSURERS AND TERMS. Each policy required under (a) shall be
                written with insurance companies licensed to do business in the
                jurisdiction in which the Building is located, and be on terms
                that are acceptable to Landlord.

        (c)     PROOF OF INSURANCE. Tenant shall provide Landlord with
                certificates of insurance or other reasonable proof that the
                coverage required under (a) is in effect. Tenant will provide
                reasonable proof at least 30 days before any policy expires that
                the expiring policy will be replaced.

        9.2     LANDLORD'S INSURANCE.

        (a)     LANDLORD'S COVERAGE. During the Term, Landlord will provide and
                keep in force the following coverage:

                (1)     Commercial general liability insurance.

                (2)     All risk insurance (including standard extended coverage
                        endorsement perils, leakage from fire protective devices
                        and other water damage) covering the full replacement
                        cost of the Project improvements (excepting the
                        Leasehold Improvements to be insured by Tenant). Each of
                        these policies shall include a provision or endorsement
                        in which the insurer waives its right of subrogation
                        against Tenant.

                (3)     Insurance covering the perils described in (2) for
                        Landlord's loss of rental income or insurable gross
                        profits. Each of these policies shall include a
                        provision or endorsement in which the insurer waives its
                        right of subrogation against Tenant.

                (4)     Boiler and machinery insurance.

                (5)     Other insurance that Landlord elects to maintain.

        (b)     TERMS. Each of the policies required under (a) will have those
                limits, deductibles, retentions and other terms that Landlord
                prudently determines.

10.     DAMAGE OR DESTRUCTION

        10.1    DAMAGE AND REPAIR. If the Leasehold Improvements, Premises or
Building is damaged by fire or other casualty, then the parties will proceed as
follows:

        (a)     LANDLORD'S ESTIMATES. Landlord will assess the damage to the
                Project (but not the Leasehold Improvements) and notify Tenant
                of Landlord's reasonable estimate of the time required to
                substantially complete repairs and restoration of the Project
                ("Repair Estimate"). Landlord will also estimate the time that
                the Premises will be untenantable ("Interruption Estimate").
                Within 30 days after the later of the casualty, issuance of the
                Repair Estimate, issuance of the Interruption Estimate, or
                receipt of any denial of coverage or reservation of rights from
                Landlord's insurer, each party may terminate the Lease by
                written notice to the other on the following conditions:

                (1)     Landlord may elect to terminate this Lease if either:


                                       13
<PAGE>

                        (A)     The damage occurs during the last year of the
                                Term and, or

                        (B)     The Repair Estimate exceeds 180 days, or

                        (C)     The repair and restoration is not fully covered
                                by insurance maintained or required to be
                                maintained by Landlord (subject only to those
                                deductibles or retentions Landlord elected to
                                maintain) or Landlord's insurer denies coverage
                                or reserves its rights on coverage or Landlord's
                                mortgagee requires that insurance proceeds be
                                applied to the indebtedness secured by its
                                mortgage.

                (2)     Tenant may elect to terminate this Lease if the
                        Interruption Estimate exceeds 180 days.

        (b)     If neither party terminates the Lease under (a), then the Lease
                shall remain in full force and effect and the parties will
                proceed as follows:

                (1)     Landlord will repair and restore the Project (but not
                        Leasehold Improvements) to the condition existing prior
                        to such damage, except for modifications required by
                        law. Landlord will perform such work reasonably
                        promptly, subject to delay for loss adjustment, Tenant
                        Delay and Force Majeure.

                (2)     Tenant will repair and restore the Leasehold
                        Improvements reasonably promptly to the condition
                        existing prior to such damage, but not less than then
                        current Building Standards, except for modifications
                        required by law.

                (3)     Tenant may not terminate this Lease if the actual time
                        to perform the repairs and restoration exceeds the
                        Repair Estimate, or the actual interruption exceeds the
                        Interruption Estimate.

        10.2    RENT ABATEMENT. If as a result of the damage or destruction
under ss.10.1 the Premises are rendered untenantable for more than 5 consecutive
days, then Tenant's Base Rent and Additional Rent shall be abated to the extent
that the Premises are untenantable, except for any period after completion of
Landlord's required repairs and restoration of the Premises and that portion of
the Project necessary for Tenant's occupancy of the Premises exceeding 15 days.
Tenant's sole remedy will be the abatement of Base Rent and Additional Rent
provided under this ss.10.2, and Landlord will not be liable to Tenant for any
other amount, including damages to Tenant's Personal Property, consequential
damages, actual or constructive eviction, or abatement of any other item of
Rent.

11.     INDEMNITY

        11.1    CLAIMS. "Claims" means any and all liabilities, losses, claims,
demands, damages or expenses that are suffered or incurred by a party, including
attorneys' fees reasonably incurred by that party in the defense or enforcement
of the rights of that party.

        11.2    TENANT'S INDEMNITY.

        (a)     LANDLORD'S WAIVERS. Landlord waives any Claims against Tenant
                and its Affiliates for perils insured or required to be insured
                by Landlord under subsections (2) and (3) of ss.9.2(a), except
                to the extent caused by the gross negligence or willful
                misconduct of Tenant or its Affiliates.

        (b)     CLAIMS AGAINST LANDLORD. Unless waived by Landlord under (a),
                Tenant will indemnify and defend Landlord and its Affiliates and
                hold each of them harmless from and against Claims arising from:

                (1)     Any accident or occurrence on or about the Premises,
                        except to the extent caused by the negligence or willful
                        misconduct of Landlord or its Affiliates;

                (2)     Tenant's or its Affiliates' negligence or willful
                        misconduct;

                (3)     Tenant's failure to comply with this Lease; or

                (4)     Any claim for commission or other compensation by any
                        person other than the Brokers for services rendered to
                        Tenant in procuring this Lease; or


                                       14
<PAGE>

        11.3    LANDLORD'S INDEMNITY.

        (a)     TENANT'S WAIVERS. Tenant waives any Claims against Landlord and
                its Affiliates for:

                (1)     Peril insured or required to be insured by Tenant under
                        subsections (2), (3) and (8) of ss.9.1(a), and

                (2)     Damage caused by any public utility, public work, other
                        tenants or occupants of the Project, or persons other
                        than Landlord.

        (b)     CLAIMS AGAINST TENANT. Unless waived by Tenant under (a),
                Landlord will indemnify and defend Tenant and its Affiliates and
                hold each of them harmless from and against Claims arising from:

                (1)     Landlord's or its Affiliates' negligence or willful
                        misconduct;

                (2)     Landlord's default of this Lease; or

                (3)     Any claim for commission or other compensation by any
                        person other than the Brokers for services rendered to
                        Landlord in procuring this Lease.

        11.4    AFFILIATES DEFINED. "Affiliates" means with respect to a party
(a) that party's partners, co-members and joint venturers, (b) each corporation
or other entity that is a parent or subsidiary of that party, (c) each
corporation or other entity that is controlled by or under common control of a
parent of such party, and (d) the directors, officers, employees and agents of
that party and each person or entity described in this ss.11.4(a-c).

        11.5    SURVIVAL OF WAIVERS AND INDEMNITIES. Landlord's and Tenant's
waivers and indemnities under ss.11.2 and ss.11.3 will survive the expiration or
early termination of this Lease.

12.     CONDEMNATION

        12.1    TAKING. "Taking" means acquiring of all or part of the Project
for any public or quasi-public use by exercise of a right of eminent domain or
under any other law, or any sale in lieu thereof. If a Taking occurs:

        (a)     The Lease will terminate as of the date of a Taking if
                substantially all of the Premises becomes untenantable for
                substantially all of the remaining Term because of the Taking.

        (b)     If the Lease is not terminated under (a), Landlord shall restore
                or alter the Premises after the Taking to be tenantable, unless
                Landlord reasonably determines that it will be uneconomical to
                do so, in which case Landlord may terminate the Lease upon 60
                days prior written notice to Tenant.

        (c)     If the Lease is not terminated under (a), more than 20% of the
                Premises is untenantable because of the Taking, Tenant cannot
                operate Tenant business for the Use in the Premises after such
                Taking, and Landlord is unable to provide Tenant with comparable
                premises in the Project, then Tenant may terminate the Lease
                upon 60 days prior written notice to Landlord.

        (d)     If the Lease is not terminated under (a), (b) or (c), the Rent
                payable by Tenant will be reduced for the term of the Taking
                based upon the rentable area of the Premises made untenantable
                by the Taking.

        12.2    AWARDS. Landlord is entitled to the entire award for any claim
for a taking of any interest in this Lease or the Project, without deduction or
offset for Tenant's estate or interest; however, Tenant may make a claim for
relocation expenses and damages to Tenant's Personal Property and business to
the extent that Tenant's claim does not reduce Landlord's award.

13.     TENANT TRANSFERS

        13.1    TERMS DEFINED.

        (a)     TRANSFER DEFINED. "Transfer" means any:

                (1)     Sublease of all or part of the Premises, or assignment,
                        mortgage, hypothecation or other conveyance of an
                        interest in this Lease;

                (2)     Use of the Premises by anyone other than Tenant with
                        Tenant's consent;


                                       15
<PAGE>

                (3)     Change in Tenant's form of organization (e.g., a change
                        from a partnership to limited liability company);

                (4)     Transfer of 51% or more of Tenant's assets, shares
                        (excepting shares transferred in the normal course of
                        public trading), membership interests, partnership
                        interests or other ownership interests; or

                (5)     Transfer of effective control of Tenant.

        13.2    PROHIBITED TRANSFERS. Tenant may not enter into a Transfer or
other agreement to use or occupy the Premises that provides for rent or other
compensation based in whole or in part on the net income or profits from the
business operated in the Premises. Tenant may not enter into a Transfer if the
proposed transferee is directly or indirectly related to the Landlord under
ss.856, et seq. of the Internal Revenue Code of 1986 (as amended). Any such
Transfers shall be considered null, void and of no force or effect.

        13.3    CONSENT NOT REQUIRED. Tenant may effect a Transfer to a
Permitted Transferee without Landlord's prior consent, but with notice to
Landlord prior to the Permitted Transferee's occupancy. "Permitted Transferee"
means any person or entity that:

        (a)     Either (1) controls, is controlled by, or is under common
                control with Tenant, (2) results from the merger or
                consolidation of Tenant (for purposes hereof, "control" shall
                mean ownership of not less than 50% of all of the voting stock
                or legal and equitable interest in the entity in question), or
                (3) acquires all or substantially all of the stock and/or assets
                of Tenant as a going concern;

        (b)     Has a tangible net worth immediately following the Transfer not
                less than the greater of (1) Tenant's tangible net worth
                immediately before the Transfer, or (2) Tenant's tangible net
                worth as of the execution of this Lease; and

        (c)     Will not, by occupying the Premises, cause Landlord to breach
                any other lease or other agreement affecting the Project.

        13.4    CONSENT REQUIRED. Each proposed Transfer other than those
prohibited under ss.13.2 or permitted under ss.13.3 requires Landlord's prior
consent, in which case the parties will proceed as follows:

        (a)     TENANT'S NOTICE. Tenant shall notify Landlord at least 30 days
                prior to the proposed Transfer of the name and address of the
                proposed transferee and the proposed use of the Premises, and
                include in the notice the Transfer documents and copies of the
                proposed transferee's balance sheets and income statements (both
                current and for the past 2 years).

        (b)     LANDLORD'S RIGHTS. Within 30 days after receipt of Tenant's
                complete notice, Landlord may either:

                (1)     If the proposed Transfer is either an assignment of this
                        Lease or sublease of substantially all of the Premises,
                        terminate this Lease as of the proposed Transfer date;

                (2)     If the proposed Transfer is a sublease of all of the
                        Premises or any part of the Premises that will be
                        separately demised and have its own entrance from the
                        Common Areas, exercise a right of first refusal to
                        sublease such portion of the Premises at the lesser of
                        (A) the Rent (prorated for subletting part of the
                        Premises), or (B) the rent payable in the proposed
                        Transfer; or

                (3)     Consent or deny consent to the proposed Transfer,
                        consent not to be unreasonably withheld if:

                        (A)     The proposed transferee, in Landlord's
                                reasonable opinion, has the financial capacity
                                to meet its obligations under the proposed
                                Transfer;

                        (B)     The proposed use is consistent with the Use and
                                will not cause Landlord to be in breach of any
                                lease or other agreement affecting the Project;

                        (C)     The proposed transferee is typical of tenants
                                that directly lease premises in first-class
                                office buildings;

                        (D)     The proposed transferee is not an existing
                                tenant or an Affiliate of an existing tenant, or
                                a party with which Landlord is actively
                                negotiating to lease space


                                       16
<PAGE>

                                in the Building (or has, in the last 6 months,
                                been actively negotiating to lease space in the
                                Building); and

                        (E)     Tenant is not in Default under this Lease.

        (c)     COMPELLING CONSENT. If Landlord does not consent to a Transfer,
                Tenant's sole remedy against Landlord will be an action for
                specific performance or declaratory relief, and Tenant may not
                terminate this Lease or seek monetary damages.

        13.5    PAYMENTS TO LANDLORD. Tenant shall pay Landlord 100% of Transfer
receipts that exceed Tenant's Rent (on a per square foot basis); after Tenant is
reimbursed for Tenant's reasonable and customary out-of-pocket costs incurred in
the Transfer, including attorneys' fees, Alterations, and broker commissions.
Tenant shall pay Landlord a $1,000 review fee for each proposed Transfer,
excepting those in which Landlord exercises its rights under subsection (1) or
(2) of ss.13.4(b).

        13.6    EFFECT OF TRANSFERS. No Transfer releases Tenant or any
guarantor of this Lease from any Lease obligation. Landlord's acceptance of a
payment from any person or entity other than Tenant that occupies the Premises
does not waive Tenant's obligations under this Article 13. If Tenant is in
Default of this Lease, Landlord may proceed against Tenant without exhausting
any remedies against any transferee and may require (by written notice to any
transferee) any transferee to pay Transfer rent owed Tenant directly to Landlord
(which Landlord will apply against Tenant's Lease obligations). Termination of
this Lease for any reason will not result in a merger. Each sublease will be
deemed terminated upon termination of this Lease unless Landlord notifies the
subtenant in writing of Landlord's election to assume any sublease, in which
case the subtenant shall attorn to Landlord under the executory terms of the
sublease.

14.     LANDLORD TRANSFERS

        14.1    LANDLORD'S TRANSFER. Landlord's right to transfer any interest
in the Project or this Lease is not limited by this Lease. Upon any such
transfer, Tenant will attorn to Landlord's transferee and Landlord will be
released from liability under this Lease, except for any Lease obligations
accruing before the transfer that are not assumed by the transferee.

        14.2    SUBORDINATION. This Lease is, and will at all times be, subject
and subordinate to each ground lease, mortgage, deed to secure debt or deed of
trust now or later encumbering the Building, including each renewal,
modification, supplement, amendment, consolidation or replacement thereof (each,
an "Encumbrance"). At Landlord's request, Tenant will, without charge, promptly
execute, acknowledge and deliver to Landlord (or, at Landlord's request, the
Encumbrance holder) an instrument in the form of Exhibit D attached hereto and
made a part hereof (it being agreed that the name and address of the Encumbrance
holder named therein may change from time to time). Notwithstanding the
foregoing, each Encumbrance holder may unilaterally elect to subordinate its
Encumbrance to this Lease.

        14.3    ATTORNMENT. Tenant will automatically attorn to any transferee
of Landlord's interest in the Project that succeeds Landlord by reason of a
termination, foreclosure or enforcement proceeding of an Encumbrance, or by
delivery of a deed in lieu of any foreclosure or proceeding (a "Successor
Landlord"). In this event, the Lease will continue in full force and effect as a
direct lease between the Successor Landlord and Tenant on all of the terms of
this Lease, except that the Successor Landlord shall not be:

        (a)     Liable for any obligation of Landlord under this Lease, or be
                subject to any counterclaim, defense or offset accruing before
                Successor Landlord succeeds to Landlord's interest;

        (b)     Bound by any modification or amendment of this Lease made
                without Successor Landlord's consent,

        (c)     Bound by any prepayment of more than one month's Rent;

        (d)     Obligated to return any Security Deposit not paid over to
                Successor Landlord, or

        (e)     Obligated to perform any improvements to the Premises (or
                provide an allowance therefor). Upon Successor Landlord's
                request, Tenant will, without charge, promptly execute,
                acknowledge and deliver to Successor Landlord any instrument
                reasonably necessary required to evidence such attornment.


                                       17
<PAGE>

        14.4    ESTOPPEL CERTIFICATE. Within 10 days after receipt of Landlord's
written request, Tenant (and each guarantor of the Lease) will execute,
acknowledge and deliver to Landlord a certificate upon which Landlord and each
existing or prospective Encumbrance holder may rely confirming the following (or
any exceptions to the following):

        (a)     The Commencement Date and Expiration Date;

        (b)     The documents that constitute the Lease, and that the Lease is
                unmodified and in full force and effect;

        (c)     The date through which Base Rent, Additional Rent, and other
                Rent has been paid;

        (d)     That neither Landlord nor Tenant is in Default;

        (e)     That Landlord has satisfied all Lease obligations to improve the
                Premises (or provide Tenant an allowance therefor) and Tenant
                has accepted the Premises;

        (f)     That Tenant solely occupies the Premises; and

        (g)     Such other matters concerning this Lease or Tenant's occupancy
                that Landlord may reasonably require.

15.     DEFAULT AND REMEDIES

        15.1    TENANT'S DEFAULT AND REMEDIES.

        (a)     Tenant will be in "Default" of this Lease if Tenant either:

                (1)     Fails to pay Rent when due, and the failure continues
                        for 3 days after Landlord notifies Tenant of this
                        failure under ss.17.2 (Tenant waiving any other notice
                        that may be required by law);

                (2)     Fails to perform a non-monetary Lease obligation of
                        Tenant and the failure continues for 10 days after
                        Landlord notifies Tenant of this failure, but:

                        (A)     In an emergency Landlord may require Tenant to
                                perform this obligation in a reasonable time of
                                less than 10 days, or

                        (B)     If it will reasonably take more than 10 days to
                                perform this obligation, then Tenant will have a
                                reasonable time not exceeding 30 days to perform
                                this obligation, but only if Tenant commences
                                performing this obligation within 10 days after
                                Landlord notifies Tenant of this failure;

                (3)     Consummates a Transfer that violates Article 13;

                (4)     Fails, within 15 days after it occurs, to discharge any
                        attachment or levy on Tenant's interest in this Lease;
                        or

                (5)     Fails, within 60 days after it occurs, to have vacated
                        or dismissed any appointment of a receiver or trustee of
                        Tenant's assets (or any Lease guarantor's assets), or
                        any voluntary or involuntary bankruptcy or assignment
                        for the benefit of Tenant's creditors (or any Lease
                        guarantor's creditors).

        (b)     If Tenant is in Default, Landlord may, without prejudice to the
                exercise of any other remedy, exercise any remedy available
                under law, including those described below:

                (1)     Landlord may enter the Premises as reasonably required
                        and cure Tenant's Default on Tenant's behalf without
                        releasing Tenant from any Lease obligation, and Tenant
                        shall reimburse Landlord on demand for all costs of such
                        cure, plus Landlord's standard administration fee.

                (2)     Landlord may terminate this Lease upon notice to Tenant
                        (on a date specified in the notice) and recover
                        possession of the Premises from Tenant. At Landlord's
                        election, either:


                                       18
<PAGE>

                        (A)     Landlord may recover any Rent unpaid as of the
                                termination date, and Tenant will remain liable
                                for the payment when due of Rent for the
                                remaining Term, less the proceeds that Landlord
                                receives in reletting the Premises, but only
                                after Landlord is reimbursed from these proceeds
                                for the expenses Landlord incurs to recover
                                possession of the Premises and relet the
                                Premises; or

                        (B)     Landlord may recover any Rent unpaid as of the
                                termination date, and further recover the
                                present value as of the termination date
                                (calculated using the then current discount rate
                                of the Federal Reserve Bank of New York) of the
                                Rent to be paid for the Term remaining after the
                                termination date (assuming 8% annual increases
                                in Additional Rent) exceeds the proceeds that
                                Landlord receives in reletting the Premises, but
                                only after Landlord is reimbursed from these
                                proceeds for the expenses Landlord incurs to
                                recover possession of the Premises and relet the
                                Premises.

                (3)     Landlord may use reasonably necessary force to enter and
                        take possession of all or any part of the Premises,
                        expel Tenant or any other occupant, and remove their
                        personal property, and the entry will not constitute a
                        trespass or terminate the Lease. After regaining
                        possession of the Premises, Landlord may relet the
                        Premises for Tenant's account, but Landlord will not be
                        responsible or liable if Landlord fails to do so or is
                        unable to collect rent due from any reletting. Tenant
                        will continue to pay Rent due, less a credit for the
                        proceeds that Landlord receives in reletting the
                        Premises, but only after Landlord is reimbursed from
                        these proceeds for the expenses Landlord incurs to
                        recover possession of the Premises and relet the
                        Premises.

                (4)     For any amounts owed under (1), (2) or (3), recover
                        interest at the greater of the interest rate permitted
                        under law or 10% ("Default Rate") from the date each
                        amount is due until paid by Tenant.

        15.2    LANDLORD'S DEFAULT AND REMEDIES.

        (a)     Landlord will be in "Default" of this Lease if Landlord fails to
                perform any Lease obligation of Landlord and this failure
                continues for 20 days after Tenant notifies Landlord of such
                failure, or such longer period of time as is reasonable if more
                than 20 days is reasonably required to perform this obligation
                if performance commences within this 20-day period and is
                diligently prosecuted to completion.

        (b)     If Landlord is in Default, then Tenant may exercise any remedy
                available under law that is not waived or limited under this
                Lease, subject to the following:

                (1)     Tenant may not terminate this Lease due to any Landlord
                        Default until Tenant notifies each Encumbrance holder
                        and each Encumbrance holder is provided a reasonable
                        opportunity to gain legal possession of the Project and,
                        after gaining possession, cure the Default.

                (2)     Landlord's liability under this Lease is limited to
                        Landlord's interest in the Building, and if Landlord is
                        comprised of more than one entity, the liability of each
                        entity comprising Landlord shall be several only (not
                        joint) based upon such entity's proportionate share of
                        ownership in the Building.

                (3)     No liability under this Lease is assumed by Landlord's
                        Affiliates.

                (4)     Any liability of Landlord to Tenant (or any person or
                        entity claiming by, through or under Tenant) for any
                        default by Landlord under the Lease or any matter
                        relating to the occupancy or use of the Premises and/or
                        the Building shall be limited to Tenant's actual direct,
                        but not consequential, damages therefore.

        15.3    ENFORCEMENT COSTS. If Landlord or Tenant brings any action
against the other to enforce or interpret any provision of this Lease (including
any claim in a bankruptcy or an assignment for the benefit of creditors), the
prevailing party will be entitled to recover from the other reasonable costs and
attorneys' fees incurred in such action.


                                       19
<PAGE>

        15.4    JURY TRIAL. Landlord and Tenant each waive trial by jury in any
action, proceeding or counterclaim brought by either party against the other
concerning any matter related to this Lease.

        15.5    FORCE MAJEURE. "Force Majeure" means any cause or event beyond
both Landlord's and Tenant's reasonable control, including any act of God,
government act or restriction, labor disturbance, general shortage of materials
or supplies, riot, insurrection, or act of war or terrorism. Force Majeure
excuses a party from performing any non-monetary Lease obligation for a
commercially reasonable time.

        15.6    LANDLORD'S LIEN. In addition to the statutory landlord's lien,
Tenant grants to Landlord, to secure performance of Tenant's obligations
hereunder, a security interest in all goods, inventory, equipment, fixtures,
furniture, improvements, chattel paper, accounts, and general intangibles, and
other personal property of Tenant now or hereafter situated on or relating to
Tenant's use of the Premises, and all proceeds therefrom (the "COLLATERAL"), and
the Collateral shall not be removed from the Premises without the consent of
Landlord until all obligations of Tenant have been fully performed. Upon the
occurrence of an Event of Default, Landlord may, in addition to all other
remedies, without notice or demand except as provided below, exercise the rights
afforded a secured party under the Uniform Commercial Code of the Jurisdiction
in which the Building is located. Tenant hereby agrees that Landlord may file
any financing statement or other instrument necessary to perfect the security
interest in the Collateral granted to Landlord herein.

16.     SECURITY DEPOSIT

        16.1    DEPOSIT. Tenant will deposit the Security Deposit with Landlord
on execution of this Lease. Landlord is not required to either segregate the
Security Deposit from any other funds or pay any interest on the Security
Deposit. The Security Deposit secures Tenant's performance of all Lease
obligations. Landlord may apply the Security Deposit against any cost Landlord
incurs or damage Landlord suffers because Tenant fails to perform any Lease
obligation, including payment of Rent. Upon Landlord's demand, Tenant shall
replenish any Security Deposit applied by Landlord.

        16.2    REFUND. If Tenant fully and faithfully performs all of its Lease
obligations, then Landlord will refund the Security Deposit (or any balance
remaining) to Tenant within 60 days after the expiration or early termination of
the Term and Tenant's vacation and surrender of the Premises to Landlord in the
condition required by ss.3.3. If Tenant has assigned this Lease, Landlord may
return the Security Deposit to either Tenant or the then current assignee.
Landlord's transfer of the Security Deposit to any transferee of Landlord's
interest in the Building relieves Landlord of its obligations under this
section, and Tenant will look solely to Landlord's transferee for return of the
Security Deposit.

17.     MISCELLANEOUS

        17.1    RULES AND REGULATIONS. Tenant will comply with the Rules and
Regulations attached as Exhibit C. Landlord reasonably modify or add to the
Rules and Regulations upon notice to Tenant. If the Rules and Regulations
conflict with this Lease, the Lease shall govern.

        17.2    NOTICE. Notice to Landlord must be given to Landlord's Notice
Addresses. Notice to Tenant must be given to Tenant's Notice Addresses. By
notice to the other, either party may change its Notice Address. Each notice
must be in writing and will be validly given if either: (a) the notice is
personally delivered and receipt is acknowledged in writing; (b) the notice is
delivered by private carrier (e.g., Federal Express) and receipt is acknowledged
in writing. If the party to receive notice refuses to acknowledge its receipt in
writing, then notice may be validly given by mailing the notice first-class,
certified or registered mail, postage prepaid, and the notice will be deemed
received by the party 2 business days after the notice's deposit in the U.S.
Mail.

        17.3    RELOCATION. Landlord may relocate Tenant to other premises in
the Building ("New Premises") upon not less than 30-days' notice, provided that
the New Premises is comparably sized and may be comparably configured for
Tenant's use. If Landlord elects to relocate Tenant under this ss.17.3, then
Landlord will, at Landlord's cost, construct Leasehold Improvements in the New
Premises of comparable quality to those existing in the Premises, move Tenant's
personal property from the Premises to the New Premises, relocate Tenant's
existing telephone and computer systems, and replace up to $500 of any in-stock
stationery identifying the Premises.

        17.4    BUILDING NAME. Tenant shall not use the Building's name or image
for any purpose, other than Tenant's address. Landlord may change the name of
the Building without any obligation or liability to Tenant.


                                       20
<PAGE>

        17.5    ENTIRE AGREEMENT. This Lease is deemed integrated and contains
all of each party's representations, waivers and obligations. The parties may
only modify or amend this Lease in a writing that is fully executed and
delivered by both parties.

        17.6    SUCCESSORS. Unless provided to the contrary elsewhere in this
Lease, this Lease binds and inures to the benefit of each party's heirs,
successors and permissible assignees.

        17.7    NO WAIVER. A party's waiver of a breach of this Lease will not
be considered a waiver of any other breach. No custom or practice that develops
between the parties will prevent either party from requiring strict performance
of the terms of this Lease. No Lease provision or act of a party creates any
relationship between the parties other than that of landlord and tenant.

        17.8    INDEPENDENT COVENANTS. The covenants of this Lease are
independent. A court's declaration that any part of this Lease is invalid, void
or illegal will not impair or invalidate the remaining parts of this Lease,
which will remain in full force and effect.

        17.9    CAPTIONS. The use of captions, headings, boldface, italics or
underlining is for convenience only, and will not affect the interpretation of
this Lease.

        17.10   AUTHORITY. Individuals signing this Lease on behalf of either
party represent and warrant that they are authorized to bind that party.

        17.11   APPLICABLE LAW. THIS LEASE IS GOVERNED BY THE LAWS OF THE
DISTRICT OF COLUMBIA, REGARDLESS OF ITS CONFLICTS PROVISION OR CHOICE OF LAW
RULES. IN ANY ACTION BROUGHT UNDER THIS LEASE, TENANT SUBMITS TO THE
JURISDICTION OF THE COURTS OF THE DISTRICT OF COLUMBIA. TO THE EXTENT PERMITTED
BY LAW, LANDLORD AND TENANT AGREE THAT VENUE FOR ANY ACTION BROUGHT BY EITHER
AGAINST THE OTHER IN CONNECTION WITH THIS LEASE SHALL LIE EXCLUSIVELY IN THE
STATE OR FEDERAL COURTS SITTING IN WASHINGTON, D.C.

        17.12   CONFIDENTIALITY. Tenant will not record this Lease or a
memorandum of this Lease without Landlord's written consent. Tenant will keep
the terms of this Lease confidential and, unless required by law, may not
disclose the terms of this Lease to anyone other than Tenant's Affiliates to the
extent necessary to Tenant's business.

        17.13   REASONABLENESS. Tenant's sole remedy for any claim against
Landlord that Landlord has unreasonably withheld or unreasonably delayed any
consent or approval shall be an action for injunctive or declaratory relief.

        17.14   TIME. Time of the essence as to all provisions in this Lease in
which time is a factor.

        17.15   QUIET ENJOYMENT. So long as Tenant is not in Default, Tenant
shall have the right to peacefully and quietly enjoy the Premises for the Term
under the terms of this Lease.

        17.16   RIGHT TO ENTER PREMISES. Landlord may enter the Premises at any
reasonable time to inspect the Premises, show the Premises to prospective
lenders, purchasers or tenants, or perform Landlord's duties under this Lease.

        17.17   EXHIBITS. The exhibits attached to this Lease are incorporated
herein. If any exhibit is inconsistent with the terms of this Lease, the
provisions of this Lease will govern.

        17.18   FINANCIAL STATEMENTS. At any time during the term of this Lease,
Tenant shall, upon ten (10) days prior written notice from Landlord, provide
Landlord with a current financial statement and financial statements for the two
(2) years prior to the current financial statement year. Such statement shall be
prepared in accordance with generally accepted accounting principles and, if
such is the normal practice of Tenant, shall be audited by an independent
certified public accountant. Tenant consents to the delivery of such financial
statements by Landlord to lenders or prospective lenders or purchasers of the
Building.

        17.19   LENDER APPROVAL. If a mortgagee of the Building has the right to
consent to this Lease and fails to give such consent, Landlord shall have the
right, at its sole option, to terminate and cancel this Lease. Such option shall
be exercisable by Landlord by written notice to Tenant of such termination,
whereupon this Lease shall be deemed cancelled and terminated, and both Landlord
and Tenant shall be relieved of any and all liabilities and obligations
hereunder.


                                       21
<PAGE>

                       [SIGNATURES TO IMMEDIATELY FOLLOW]




                                       22
<PAGE>

   HAVING READ AND INTENDING TO BE BOUND BY THE TERMS AND PROVISIONS THEREOF,
          LANDLORD AND TENANT HAVE EXECUTED THIS LEASE AS OF THE DATE.




BEHRINGER HARVARD HOLDINGS LLC,           BEHRINGER HARVARD TIC MANAGEMENT
  A DELAWARE LIMITED LIABILITY              SERVICES LP, A TEXAS LIMITED
  COMPANY                                   PARTNERSHIP, ON BEHALF OF THE
                                            OWNERS OF THE COLORADO BUILDING

                                          By: Behringer Harvard TIC MS GP, Inc.,
By: /s/ Robert M. Behringer                   Its general partner
    ---------------------------------
    Robert M. Behringer, Manager
                                          By: /s/ Terry Kennon
                                              ---------------------------------
                                              Terry Kennon, Vice President


                                       23