Document:

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                                                                   Exhibit 10.35

                                  INTEREST-FREE
                             PROMISSORY DEMAND NOTE

$ 74,375.00                                                         June 1, 1999

     FOR VALUE RECEIVED, the undersigned, Chris Hipps, ("Maker"), promises to
pay to the order of Prentiss Properties Limited, Inc., a Delaware corporation
("Payee"), the principal amount of Seventy-Four Thousand Three Hundred
Seventy-Five and No One-Hundredths Dollars ($ 74,375.00), in the lawful money of
the United States of America, together with interest on the unpaid principal
balance of this Note from time to time outstanding, at a rate per annum
(compounded annually) equal to 0.00%.

     The principal of, and all accrued interest upon, this Note shall be due and
payable on the earliest of, 1) upon termination of employment as described below
or 2) June 1, 2004, subject to the terms below.

     Maker shall have the right to prepay the unpaid principal balance of this
Note from time to time without premium or penalty, provided, however, that
accrued interest on the amount of such prepayment of principal shall be due and
payable contemporaneously with such prepayment of principal.

     No delay on the part of the holder of this Note in the exercise of any
power or right under this Note, or under any other instrument executed pursuant
hereto, shall operate as a waiver thereof, nor shall a single or partial
exercise of any power or right preclude other or further exercise thereof or the
exercise of any other power or right. A waiver on one occasion shall not be
construed as a bar to or a waiver of any other right in the future.

Notwithstanding any other terms of this Note to the contrary, the then
outstanding principal sum evidenced by this Note, shall become due and payable
immediately upon the termination of employment or separation from service of
Hipps, with the Payee for any reason other than dismissal without cause, if such
termination of employment or separation from service occurs on or before June 1,
2001. However, in the event that Hipps is either a) still employed with the
Payee on each of the following respective dates or b) has not competed against
Payee (as defined in the next paragraph), then one-fifth of the original
principal amount of this Note together with all accrued but unpaid interest
shall be forgiven on each June 1, 2000, June 1, 2001, June 1, 2002, June 1, 2003
until June 1, 2004, and then this Note shall be canceled in full and Hipps shall
have no further obligation as to the terms hereof.

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For a period of five (5) years following the date of this Note, Hipps will not
in any manner, directly or indirectly, hire or attempt to hire or encourage the
resignation of any current employee(s) of Payee, and for a period of five (5)
years following the date of this Note, Hipps will not solicit any business from
any current Dallas-based customer or client of Payee or its affiliates for his
account, for the account of any third person with whom he becomes associated or
employed, or in a consulting or brokerage capacity. Nothing herein shall be
intended to restrict any real estate firm with whom Hipps becomes associated
from soliciting business from any such customer or client, provided Hipps is not
personally involved in setting up or making any such solicitation.

     In the event that Hipps breaches the terms of the non-compete provisions of
this agreement, then Payee's sole remedy is to seek legal action to prohibit
such competition.

     Maker herewith expressly grants Payee the right, but not the obligation, to
offset any amount due to Maker from Payee upon the termination of employment or
separation from service of Maker with Payee.

     As used herein, the term "Holder" shall be deemed to include any company or
entity owned or controlled, whether directly or indirectly, by Payee.

          This Note shall be governed by and construed in accordance with the
laws of the State of Texas.

 /s/ Chris Hipps
--------------------------------
     Chris Hipps<PAGE>
                                                                   Exhibit 10.36

                                 PROMISSORY NOTE

$ 200,000.00                      Dallas, Texas                    June 30, 1999

     FOR VALUE RECEIVED, the undersigned, Dan Cushing (the "Borrower"), hereby
unconditionally promises to pay to the order of Prentiss Properties Acquisition
Partners, L.P., a Delaware limited partnership (the "Lender"), at the office of
the Lender or at such place as the holder hereof may designate from time to time
in writing, the principal amount of TWO HUNDRED THOUSAND DOLLARS ($200,000.00)
or such lesser amount as may be outstanding from time to time, plus all accrued
but unpaid interest, due in respect of the Loan and all other amounts due Lender
under this Note or the Loan Agreement (defined below) on the dates as agreed in
this Note.

     Section 1. Identification; Certain Definitions. This Note is given subject
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to the terms and conditions of the Loan Agreement of even date by and between
the Lender and the Borrower (the "Loan Agreement") and is entitled to the
benefits thereof and of all documents executed in connection therewith. All
capitalized terms not otherwise defined herein have the meanings assigned to
such terms in the Loan Agreement.

     Section 2. Maturity. The entire principal, together with all accrued but
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unpaid interest, shall be due and payable on the fifth (5th) anniversary of the
date of this Note.

     Section 3. Interest.
                ---------

          (a) The principal balance of this Note shall accrue interest from the
     date of advance at a rate of the lesser of (i) seven percent (7 %) per
     annum, and (ii) the maximum nonusurious interest rate allowed under
     applicable law (the "Maximum Rate"). Notwithstanding any provision herein
     to the contrary, all past due payments of principal and interest hereunder
     shall bear interest at the Maximum Rate.

          (b) All computations of interest, both before and after maturity,
     shall be made on the basis of a year of 365 days for the actual number of
     days (including the first day but excluding the last day) occurring in the
     period for which such interest is payable.

     Section 4. Prepayment. The indebtedness evidenced by this Note may be
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prepaid, in whole or in part, without penalty or premium, at any time and from
time to time.

     Section 5. Nature of Obligations. The obligations of Borrower under this
                ---------------------
Note and the Loan Agreement are with recourse as to the Borrower and are
unsecured.

     Section 6. Payments.
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          (a) Whenever any payment to be made under this Note shall be stated to
     be due on a day that is not a business day, the due date thereof shall be
     extended to the next succeeding business day, and, with respect to any
     payments of principal, interest thereon shall be payable at the applicable
     rate during such extension. The amount of any and all payments made to the
     Lender shall be credited first to any interest accrued and then to the

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     principal balance due under this Note until such time that said principal
     balance is paid in full.

          (b) The Borrower shall make quarterly payments in an amount equal to
     the product of the original principal amount of the Loan and the Quarterly
     Yield Rate (defined below) such payment to be made on the 17th day of
     January, April, July, and October (the "Quarterly Payment Date") of each
     calendar year until the earlier to occur of (i) the payment or prepayment
     of the outstanding principal balance together with any accrued but unpaid
     interest thereon, and (ii) the maturity date specified herein. Such payment
     shall be applied as set forth in Section 6(a) of this Note. The term
     "Quarterly Yield Rate" as used herein shall mean the percentage obtained by
     dividing (x) the amount of the quarterly dividends declared per common
     share, par value $0.01 per share, of the Lender (the "Common Shares") and
     paid on or about the Quarterly Payment Date, by (y) the closing price of a
     Common Share on the New York Stock Exchange on the date amounts under this
     Note are advanced by the Lender.

     Section 7. Events of Default. The occurrence of any of the following
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specified events shall constitute an "Event of Default":

          (a) Nonpayment. A failure by the Borrower to pay any installment of
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     interest on the Note or any principal amount when due, or any other amount
     payable thereunder or hereunder; or

          (b) Breach of Warranty. Any representation, warranty or statement made
              ------------------
     or deemed made by the Borrower herein or in any other agreement between
     Borrower and Lender shall prove to have been incorrect or untrue in any
     material respect on or as of the date made or deemed made; or

          (c) Termination of Employment. The Borrower's employment with the
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     Lender is terminated, with or without cause, or terminated by reason of
     death or disability, provided, however, that the absence of the Borrower on
     leave approved by a duly elected officer of the Lender, other than the
     Borrower, shall not be considered a termination of employment during the
     period of such leave; or

          (d) Bankruptcy. The entry of an order, judgment or decree by any court
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     of competent jurisdiction adjudicating the Borrower as a bankrupt or as
     insolvent or the making of an assignment for the benefit of creditors by
     the Borrower, or the commencement by or against the Borrower of a voluntary
     or involuntary case for relief as a debtor under Title 7 or Title 11 of the
     United States Bankruptcy Code or the commencement of any other bankruptcy,
     insolvency, reorganization, arrangement, debt adjustment, receivership,
     liquidation, trusteeship or custodianship proceedings by or against the
     Borrower, and, if instituted adversely, the consent by the Borrower to the
     same or the admission in writing of the material allegations contained in
     the petition filed in said proceedings or the admission in writing by the
     Borrower of his inability to pay his debts generally as they become due.

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     Section 8. Remedies.
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          (a) Simultaneously with the occurrence of any Event of Default
     described in Section 7(c) or (d) of this Note, the following shall occur
     automatically without any action being taken by the Lender: all obligations
     of the Borrower to the Lender shall become due and payable, whereupon an
     amount equal to the sum of the outstanding principal balance of the Note,
     any accrued but unpaid interest and all other fees and amounts owing
     hereunder and thereunder to the Lender shall become due and payable,
     without presentment, demand, protest, notice of protest, notice of intent
     to accelerate, notice of acceleration or any other notice of any kind, all
     of which are hereby expressly waived, anything contained herein or in any
     other document to the contrary notwithstanding.

          (b) During the continuance of any Event of Default described in
     Section 7(a) or (b) of this Note, at the option of the Lender, the Lender
     may, by written notice to the Borrower, declare all obligations of the
     Borrower to the Lender to be forthwith due and payable, whereupon an amount
     equal to the sum of the outstanding principal balance of the Note, any
     accrued but unpaid interest and all other fees and amounts owing hereunder
     and thereunder to the Lender shall become forthwith due and payable,
     without presentment, demand, protest, notice of protest, notice of intent
     to accelerate, notice of acceleration or any other notice of any kind, all
     of which are hereby expressly waived, anything contained herein or in any
     other document to the contrary notwithstanding.

     Section 9. Waivers. To the full extent permitted by the law, the Borrower
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hereby waves diligence, presentment, protest, demand and notice of every kind.
No failure or delay on the part of the Lender in exercising any right, power or
privilege hereunder and no course of dealing between the Borrower and the Lender
shall operate as a waiver thereof; nor shall any single or partial exercise of
any right, remedy, power or privilege hereunder preclude any other or further
exercise thereof or the exercise of any other right, remedy, power or privilege.

     Section 10. GOVERNING LAW. THIS NOTE HAS BEEN DELIVERED TO AND ACCEPTED BY
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THE BORROWER IN THE STATE OF TEXAS, AND SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE SUBSTANTIVE LAWS OF THE STATE OF TEXAS WITHOUT GIVING EFFECT
TO THE CHOICE OF LAW OR CONFLICT OF LAWS RULES THEREOF.

     Section 11. Limitations on Interest. Notwithstanding anything to the
                 -----------------------
contrary in this Note or in any document evidencing the indebtedness evidenced
hereby or in any other agreement entered into in connection herewith, whether
now existing or hereafter arising, it is agreed that the aggregate of all
interest and other charges constituting interest, or adjudicated as constituting
interest, and contracted for, chargeable or receivable under this Note or
otherwise in connection with this transaction shall under no circumstances ever
exceed the Maximum Rate. If fulfillment of any provision hereof or of any
document evidencing or securing the indebtedness contemplated hereby, at the
time performance of such provision shall be due, shall involve transcending the
Maximum Rate, then, ipso facto, the obligation to be fulfilled shall be reduced
to the Maximum Rate; and if the Lender shall ever receive anything of value
deemed interest under applicable law which would exceed the Maximum Rate, an
amount equal to any excessive interest shall be applied

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to the reduction of the principal amount owing to the Lender and not to the
payment of interest, or if such excessive interest exceeds the unpaid balance of
principal hereof, such excess shall be refunded to the Borrower. All sums paid
or agreed to be paid to the Lender for the use, forbearance or detention of the
indebtedness of the Borrower to the Lender shall, to the extent permitted by
applicable law, be amortized, prorated, allocated and spread throughout the full
term of such indebtedness until payment in full so that the rate of interest on
account of such indebtedness shall not exceed the maximum amount permitted by
applicable law. The term "applicable law" as used herein shall mean the laws of
the State of Texas or the laws of the United States, whichever laws allow the
greater rate of interest, as such laws now exist or may be changed or amended to
come into effect in the future. The provisions of this paragraph shall control
and supersede all agreements between the Borrower and the Lender.

     Section 12. Pronouns. Whenever a pronoun of a particular gender is used in
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this Note, if appropriate that pronoun also will refer to the other gender and
the neuter. Whenever a neuter pronoun is used in this Note, if appropriate that
pronoun also will refer to the masculine and feminine gender.

                            [SIGNATURE PAGE FOLLOWS]

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     IN WITNESS WHEREOF, the undersigned has executed this Note as of the day
and year first above written.

                                     BORROWER:

                                     /s/ Dan Cushing
                                     -------------------------------------------
                                        Dan Cushing

LENDER'S ADDRESS:

Prentiss Properties Acquisition Partners, L.P.
3890 West Northwest Highway
Suite 400
Dallas, Texas  75220
214-654-0886
Attention: Gregory S. Imhoff

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