The party of the third part, in consideration of the premises, hereby agree to advance, as upon a loan, to the said parties of the second part, their survivors and successors, all such sums of money, and at such times as maybe necessary, to enable said trustees, economically and promptly, to execute and perform the conditions of said contract, upon the call of said parties of the second part, their survivors and successors, such sums never to exceed in the whole the amount provided for in said contract, to be paid by the Union Pacific railroad company, for the execution and performance thereof, and to receive therefor interest at the rate of seven per cent per annum, payable semi-annually, on each sum so advanced, until the same are repaid. And said party of the third part do further agree, for the consideration aforesaid, and for an amount equal to two and one-half per cent on the amount to be by them advanced, to be paid to them as commission, to, and do hereby guarantee unto, the parties of the first part and second part, the due performance and execution of the said contract, according to its terms and conditions, and do indemnify and hold harmless the said parties of the first and second part of and from all cost, liability, loss or damage to them, or either of them, arising from or on account of said contract, and to the faithful performance of the agreement, contracts, and conditions herein above specified to be done and performed by each. And this conveyance and transfer is made upon the further trust and condition. That the trustees shall adjust and pay over to the Credit Mobilier of America such portion of the net profits of the work done and material furnished on the first one hundred miles west of the one-hundredth meridian, as was done and performed prior to January 1, 1867. In witness whereof, the party of the first part, the several parties of the second part, in their own proper persons, have hereunto set their hands and seals, and the party of the third part has caused these presents to be executed by its president, attested by its secretary with the seal of the said company, on the day and year above written. OAKES AMES, THOMAS C. DURANT, OLIVER AMES, JOHN B. ALLEY, SIDNEY DILLON, CORNELIUS S. BUSHNELL, H. S. MCCOMB, BENJAMIN E. BATES. Signed, sealed, and delivered in presence of CLARK BELL. The Credit Mobilier of America, by its president, SIDNEY DILLON. Attest: BENJAMIN F. HAM, _Assistant Secretary_.