Experience has proved that the routes across the isthmus of Central America are at best but a very uncertain and unreliable mode of communication. But even if this were not the case, they would at once be closed against us in the event of war with a naval power so much stronger than our own as to enable it to blockade the ports at either end of these routes. After all, therefore, we can only rely upon a military road through our own Territories; and ever since the origin of the Government Congress has been in the practice of appropriating money from the public Treasury for the construction of such roads. The difficulties and the expense of constructing a military railroad to connect our Atlantic and Pacific States have been greatly exaggerated. The distance on the Arizona route, near the thirty-second parallel of north latitude, between the western boundary of Texas, on the Rio Grande, and the eastern boundary of California, on the Colorado, from the best explorations now within our knowledge, does not exceed 470 miles, and the face of the country is in the main favorable. For obvious reasons the Government ought not to undertake the work itself by means of its own agents. This ought to be committed to other agencies, which Congress might assist, either by grants of land or money, or by both, upon such terms and conditions as they may deem most beneficial for the country. Provision might thus be made not only for the safe, rapid, and economical transportation of troops and munitions of war, but also of the public mails. The commercial interests of the whole country, both East and West, would be greatly promoted by such a road, and, above all, it would be a powerful additional bond of union. And although advantages of this kind, whether postal, commercial, or political, can not confer constitutional power, yet they may furnish auxiliary arguments in favor of expediting a work which, in my judgment, is clearly embraced within the war-making power. For these reasons I commend to the friendly consideration of Congress the subject of the Pacific Railroad, without finally committing myself to any particular route. The report of the Secretary of the Treasury will furnish a detailed statement of the condition of the public finances and of the respective branches of the public service devolved upon that Department of the Government. By this report it appears that the amount of revenue received from all sources into the Treasury during the fiscal year ending the 30th June, 1857, was $68,631,513.67, which amount, with the balance of $19,901,325.45 remaining in the Treasury at the commencement of the year, made an aggregate for the service of the year of $88,532,839.12.