A bill containing the same language, with the single exception that the sum appropriated therein was $40,000 instead of $59,576, passed both Houses of Congress at their last session; but it was presented to me at so late a period of the session that I could not examine its merits before the time fixed for the adjournment, and it therefore, under the Constitution, failed to become a law. The increase of the sum appropriated in the present bill over that in the bill of the last session, being within a fraction of $20,000, has induced me to examine the question with some attention, and I find that the bill involves an important principle, which if established by Congress may take large sums out of the Treasury. It appears that on the 1st day of April, 1858, John M. Hockaday entered into a contract with the Postmaster-General for transporting the mail on route No. 8911, from St. Joseph, Mo., by Fort Kearney, Nebraska Territory, and Fort Leavenworth, to Salt Lake City, for the sum of $190,000 per annum for a weekly service. The service was to commence on the 1st day of May, 1858, and to terminate on the 30th November, 1860. By this contract the Postmaster-General reserved to himself the right "to reduce the service to semimonthly whenever the necessities of the public and the condition of affairs in the Territory of Utah may not require it more frequently." And again: That the Postmaster-General may discontinue or curtail the service, in whole or in part, in order to place on the route a greater degree of service, or whenever the public interests require such discontinuance for any other cause, he allowing one month's extra pay on the amount of service dispensed with. On the 11th April, 1859, the Postmaster-General curtailed the service, which he had a clear right to do under the contract, to semimonthly, with an annual deduction of $65,000, leaving the compensation $125,000 for twenty-four trips per year instead of $190,000 for fifty-two trips. This curtailment was not to take effect till the 1st of July, 1859. At the time the contract was made it was expected that the army in Utah might be engaged in active operations, and hence the necessity of frequent communications between the War Department and that Territory. The reservation of the power to curtail the service to semimonthly trips itself proves that the parties had in view the contingency of such curtailment "whenever the necessities of the public and the condition of affairs in the Territory of Utah may not require it more frequently." Before the Postmaster-General ordered this curtailment he had an interview with the Secretary of War upon the subject, in the course of which the Secretary agreed that a weekly mail to St. Joseph and Salt Lake City was no longer needed for the purposes of the Government--this, evidently, because the trouble in Utah had ended.