The progress and condition of the mail service for the past year are fully presented in the report of the Postmaster-General. The revenue for the year ending on the 30th of June last amounted to $3,487,199, which is $802,642.45 less than that of the preceding year. The payments for that Department during the same time amounted to $4,084,297.22. Of this sum $597,097.80 have been drawn from the Treasury. The disbursements for the year were $236,434.77 less than those of the preceding year. While the disbursements have been thus diminished, the mail facilities have been enlarged by new mail routes of 5,739 miles, an increase of transportation of 1,764,145 miles, and the establishment of 418 new post-offices. Contractors, postmasters, and others engaged in this branch of the service have performed their duties with energy and faithfulness deserving commendation. For many interesting details connected with the operations of this establishment you are referred to the report of the Postmaster-General, and his suggestions for improving its revenues are recommended to your favorable consideration. I repeat the opinion expressed in my last annual message that the business of this Department should be so regulated chat the revenues derived from it should be made to equal the expenditures, and it is believed that this may be done by proper modifications of the present laws, as suggested in the report of the Postmaster-General, without changing the present rates of postage. With full reliance upon the wisdom and patriotism of your deliberations, it, will be my duty, as it will be my anxious desire, to cooperate with you in every constitutional effort to promote the welfare and maintain the honor of our common country. JAMES K. POLK. SPECIAL MESSAGES. WASHINGTON, _December 14, 1846_. _To the Senate of the United States_: I transmit to the Senate, for their consideration and advice with regard to its ratification, a convention for the mutual surrender of criminals between the United States and the Swiss Confederation, signed by their respective plenipotentiaries on the 15th of September last at Paris. I transmit also a copy of a dispatch from the plenipotentiary of the United States, with the accompanying documents. JAMES K. POLK. WASHINGTON, _December 22, 1846_. _To the House of Representatives of the United States_: In compliance with the request contained in the resolution of the House of Representatives of the 15th instant, I communicate herewith reports from the Secretary of War and the Secretary of the Navy, with the documents which accompany them. These documents contain all the "orders or instructions" to any military, naval, or other officer of the Government "in relation to the establishment or organization of civil government in any portion of the territory of Mexico which has or might be taken possession of by the Army or Navy of the United States."