Document:

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                                       ***TEXT OMITTED AND FILED SEPARATELY
                                           CONFIDENTIAL TREATMENT REQUESTED
                                            UNDER 17 C.F.R. SS.SS.200.80(B)(4),
                                                 200.83 AND 240.24B-2
                                       =========================================

                            THIRD AMENDMENT AGREEMENT
                            -------------------------

         This Third Amendment Agreement ("Amendment No.3") effective as of the
last date on the signature page hereof, by and between Corvas International,
Inc. ("Corvas") and Schering Corporation and Schering-Plough Ltd. (collectively
"Schering") amends and supplements that certain Collaboration and License
Agreement among Corvas and Schering effective December 14, 1994, as amended by:
the Letter of Understanding signed on December 17, 1996; the Letter of
Agreement, dated December 15, 1998, extending the term of the Factor Xa Research
Program; and the Amendment Agreement dated February 18, 1999, the Second
Amendment Agreement dated June 29, 1999, and the Letter of Agreement dated
September 8, 1999 (collectively, the "Agreement").

         The parties hereby agree to further amend the Agreement as follows:

         Except as expressly defined herein, all capitalized terms shall have
the meanings set forth in the Agreement, as amended.

1. The term of the Factor Xa Research Program is hereby extended for an
additional period of one (1) year to expire on December 14, 2000 (the "New
Extension Period"). All references in the Agreement to the Extension shall
include the New Extension Period.

2. Schering shall pay to Corvas three (3) million dollars ($3,000,000) in
research funding during the New Extension Period provided for under this
Amendment No. 3. The research funding shall be in four (4) equal quarterly
payments, to be paid on or before January 14, 2000, April 14, 2000, July 14,
2000 and September 14, 2000.

3. Corvas shall provide staffing for the Factor Xa Research Program at a level
of [...***...] FTEs [...***...] during the New Extension Period.

4. As soon as practicable after the effective date of this Amendment No. 3,
Schering and Corvas shall amend Exhibit G of the Agreement to describe the
responsibilities of the parties with respect to performance of the Factor Xa
Research Program during the New Extension Period. The parties acknowledge and
agree that Corvas' responsibilities during the New Extension Period shall
include the performance, at Corvas' expense, of certain in vivo biological
studies, limited to studies in dogs, using Program Thrombin Inhibitors and/or
Program Factor Xa Inhibitors selected for such testing to assess oral
bioavailability. Corvas shall have the right to use one or more subcontractors
for the performance of such studies. Schering shall bear the responsibility of
assessing the in vivo efficacy of Program Thrombin Inhibitors and/or Program
Factor Xa Inhibitors in appropriate models at Schering's expense. To the extent
that Schering requests Corvas to perform such in vivo efficacy testing on
Schering's behalf, Schering shall reimburse Corvas for the costs of such testing
based upon detailed invoices to be provided by Corvas.

*Confidential Treatment Requested

                                       1.
<PAGE>

5. Schering shall have the right to further extend the term of the Factor Xa
Research Program by providing written notice to Corvas to that effect on or
before November 14, 2000. Upon receipt of such notice the parties shall meet in
good faith to negotiate the duration, funding, and level of FTE support to be
provided during such further extension.

6. Corvas shall promptly notify Schering in writing of any and all changes in
the Corvas chemistry personnel assigned to the Factor Xa Research Program.
Recognizing that the continuity of the chemistry effort is critical to the
success of the program, in the event such changes will significantly affect the
Corvas personnel responsible for directing or supporting the chemistry effort,
Corvas shall designate suitable replacement(s) for such personnel, subject to
Schering's approval, which shall not be unreasonably withheld. If the parties
cannot agree upon the suitability of the replacement(s), Schering shall have the
right to terminate the Factor Xa Inhibitor Research Program.

         Except as expressly amended and supplemented hereby, all other terms of
the Agreement shall remain in full force and effect.

         IN WITNESS WHEREOF, the parties hereto have caused this Amendment
Agreement to be executed in duplicate by their duly authorized representatives.

CORVAS INTERNATIONAL, INC..               SCHERING CORPORATION

BY:   /s/ RANDALL E. WOODS                BY:  /s/ DAVID POORVIN
   ------------------------------            ------------------------

NAME:  Randall E. Woods                   NAME:  David Poorvin
     ----------------------------              ----------------------

TITLE:   President & CEO                  TITLE: Vice President
     ----------------------------              ----------------------

DATE:    December 7, 1999                 DATE:  December 7, 1999
     ----------------------------              ----------------------

                                          SCHERING-PLOUGH LTD.

                                          BY:    /s/ DAVID POORVIN
                                             ------------------------

                                          NAME:   David Poorvin
                                               ----------------------

                                          TITLE:  Vice President
                                               ----------------------

                                          DATE:   December 7, 1999
                                               ----------------------

                                       2.EXHIBIT 10.9

                EMPLOYMENT AGREEMENT DATED APRIL 14, 1999 BETWEEN
                      THE COMPANY AND RICHARD K. DICKSON II

<PAGE>

                              EMPLOYMENT AGREEMENT
                              --------------------

         This Employment Agreement (the "Agreement") is effective as of the 14th
day of April 1999, by and between Global Outdoors, Inc., an Alaska corporation
(the "Company") and Richard K. Dickson II ("Dickson").

         WHEREAS, Dickson has performed services for the Company for
approximately 14 years; and

         WHEREAS, the Company desires to employ Dickson pursuant to a written
contract and Dickson desires to be so employed by the Company.

         NOW, THEREFORE, in consideration of the premises and the mutual
covenants and agreements contained herein, and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereby agree as follows:

         1. EMPLOYMENT AGREEMENT.

                  (a) From April 15, 1999, and for the balance of the Term of
this Agreement (the "Employment Period"), the Company appoints Dickson as Chief
Operating Office, General Counsel and a Director. Mr. Dickson will perform such
duties consistent with such positions and as are from time to time delegated to
Dickson by the Board of Directors or Chief Executive Officer of the Company.
Specifically, Dickson's duties shall include the responsibility for an expanded
marketing effort.

                  (b) During the Employment Period the Company shall provide
Dickson as his principal office with private office(s), secretarial and
administrative assistance, office equipment, supplies and other facilities and
services suitable to Dickson's position. It is understood by the parties hereto
that there will be a transition period of approximately nine months for Dickson
to complete his relocation to Temecula from Orange County.

         2. TERM. The term ("Term") of this Agreement shall commence on April
15, 1999 and shall continue until April 14, 2000, and the Employment Period
thereafter shall be automatically extended for twelve month periods upon the
same terms and subject to the same conditions as herein set forth, until
terminated or modified, or unless either party has delivered written notice at
least ninety (90) days prior to the end of the Term or of any extension thereof
to the effect that the term should not be further extended.

         3. COMPENSATION. In consideration of the services to be rendered by
Dickson to the Company, the Company hereby agrees to pay or otherwise provide
Dickson the following compensation and benefits:

         (a) SALARY. During the Employment Period, Dickson shall receive:

                                       -1-
<PAGE>

                  (i)      A salary of $10,0000 per month, payable monthly in
arrears;

                  (ii) From April 1 to September 1, 1999, $7,500 of that amount
shall be paid in cash with the balance accruing as deferred compensation. From
September 1, 1999 forward $8,500 of that amount shall be paid in cash with the
balance accruing as deferred compensation.

                  (iii) Amounts accrued as deferred compensation may be paid at
the election of Dickson either in cash or Common Stock, however in the event
Dickson elects to receive payment in cash, such payment may be further deferred,
in part or in whole, by the Company until such time as the Company has
sufficient cash reserves to make such payments. In the event Dickson elects to
be paid in Common Stock, the price of such stock shall be the price the stock
was trading at when the compensation was earned, if it is deemed legal to do so.

         (b) STOCK OPTIONS. The Company hereby grants Dickson an option to
purchase 60,000 shares of Common Stock at a purchase price of $3.00 per share.
This is an amount of shares approximately equivalent to the deferred
compensation Dickson has earned and is anticipated to earn during the initial
Term, hereof, that could be utilized by Dickson to pay the purchase price of
said shares. 45,000 of said shares are exercisable immediately and 15,000 shares
shall vest on April 1, 2000. The options shall be for ten (10) years and shall
expire on March 31, 2009.

         (c) BONUSES. Bonuses shall be payable at least once a year in amounts
reasonably determined in good faith by the Company. It is the Company's intent
to establish goals and objectives for Dickson as a partial basis for bonuses.
The Company shall make a good faith effort to pay Dickson a special bonus of
$100,000 in five years from the date hereof, which special bonus is intended to
be paid to Dickson so that he can retire a portion of his home mortgage.

         (d) INDUCEMENTS. The following are inducements for Dickson to be
employed by the Company:

                  (i) The Company shall pay Dickson $19,000 plus accumulated
interest at 6% from April 1, 1999, on February 1, 2001.

                  (ii) In the event that the Company, for any reason, terminates
Mr. Dickson or reduces his salary, the Company shall make the monthly payments
to Dickson of $1,500 for a period of three (3) years (potential $54,000 benefit
to Dickson). To be used to pay home mortgage.

                  (iii) The Company will obtain term life and disability
insurance for Dickson in the amount of at least $75,000.

         (e) BENEFIT PLANS. In addition to the fees and compensation set forth
above, Dickson shall be entitled to participate in all benefit programs provided
by the Company, including, without limitation, any health, accident, disability
and life insurance programs, retirement programs, vacation and sick leave
benefits, and any other fringe benefit program, including an automobile

                                       -2-
<PAGE>

and/or cellular phone allowance, which the Company may adopt and implement for
the benefit of the Company's officers or employees.

         (f) MOVING EXPENSES. Payment of reasonable expenses relating to the
packing, moving and unpacking of Dickson's household goods and furnishings to
the Temecula, California area, limited to $2,000.00 maximum.

         (g) THE OUTDOOR CHANNEL. Salary paid and accrued by The Outdoor Channel
to Dickson shall reduce the monthly salary due Dickson.

         4. INDEPENDENT ADVICE. The Company has been advised by Dickson in
writing that the Company may seek the advice of an independent lawyer of the
Company's choice regarding this Agreement and has been given a reasonable
opportunity consisting of at least ten (10) days to seek such advice and , in
fact, has sought such advice.

         5. COMPETITIVE ACTIVITIES.

         (a) During the term of this Agreement Dickson shall not, directly or
indirectly, either as an employee, employer, consultant, agent, principal,
partner, stockholder, corporate officer, director, or in any other individual or
representative capacity, engage or participate in any business that is in
competition in any manner whatsoever with the business of Global.

         (b) Dickson agrees that during the term of this Agreement and for a
period of one year after termination of this Agreement, Dickson shall not
directly or indirectly solicit, hire, recruit, or encourage any other employee
of Global to leave Global.

         6. CONFIDENTIALITY. Dickson recognizes and acknowledges that in the
course of his employment with the Company, as contemplated by this Agreement,
and as a result of the position of trust that he will hold under this Agreement,
he will obtain private and confidential information and proprietary data
relating to the Company, including without limitation, financial information,
product and design information, marketing information, customer lists and other
data that are valuable assets and property rights of the Company (collectively
referred to as "Confidential Information"). Dickson agrees that he will not,
during the Term or any time after the termination of the Term, either directly
or indirectly, disclose or use any Confidential Information acquired during his
employment with the Company, unless (i) the Confidential Information has been
made public through no action or fault of Dickson, or (ii) its disclosure is
requested or compelled by applicable law or regulatory agency. Dickson further
agrees that after the termination of this Agreement, or at such other time as
the Company requests, Dickson will return to the Company all documents, papers
and records constituting Confidential Information, and all copies of same in
Dickson's possession and control.

         8. INDEMNIFICATION OF LOSSES OF DICKSON. The Company shall indemnify
Dickson for all losses sustained by Dickson in direct consequences of the
discharge of his duties on the Company's behalf.

                                       -3-
<PAGE>

         9. SUMS DUE UPON DEATH. If Dickson dies prior to the expiration of the
term of his employment, any sums that may be due him from the Company under this
Agreement as of the date of death shall be paid to Dickson's executors,
administrators, heirs, personal representatives, successors and assigns.

         10. COUNTERPARTS. This Agreement may be signed in counterparts.

         IN WITNESS WHEREOF, the parties have executed this Agreement as of the
day and year first above written.

                                              GLOBAL OUTDOORS, INC.

                                              By:  /S/PERRY T. MASSIE
                                                   -----------------------------
                                                   Perry T. Massie, Chairman and
                                                   Chief Executive Officer

                                                   /S/RICHARD K. DICKSON II
                                              ----------------------------------
                                                   Richard K. Dickson II

                                       -4-

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