At the close of the last fiscal year the length of mail routes within the United States was 196,290 miles, the annual transportation thereon 53,272,252 miles, and the annual cost of such transportation $3,421,754. The length of the foreign mail routes is estimated at 18,349 miles and the annual transportation thereon at 615,206 miles. The annual cost of this service is $1,472,187, of which $448,937 are paid by the Post-Office Department and $1,023,250 are paid through the Navy Department. The annual transportation within the United States, excluding the service in California and Oregon, which is now for the first time reported and embraced in the tabular statements of the Department, exceeds that of the preceding year 6,162,855 miles, at an increased cost of $547,110. The whole number of post-offices in the United States on the 30th day of June last was 19,796. There were 1,698 post-offices established and 256 discontinued during the year. The gross revenues of the Department for the fiscal year, including the appropriations for the franked matter of Congress, of the Departments, and officers of Government, and excluding the foreign postages collected for and payable to the British post-office, amounted to $6,727,866.78. The expenditures for the same period, excluding $20,599.49, paid under an award of the Auditor, in pursuance of a resolution of the last Congress, for mail service on the Ohio and Mississippi rivers in 1832 and 1833, and the amount paid to the British post-office for foreign postages collected for and payable to that office, amounted to $6,024,566.79, leaving a balance of revenue over the proper expenditures of the year of $703,299.99. The receipts for postages during the year, excluding the foreign postages collected for and payable to the British post-office, amounted to $6,345,747.21, being an increase of $997,610.79, or 18.65 per cent, over the like receipts for the preceding year. The reduction of postage under the act of March last did not take effect until the commencement of the present fiscal year. The accounts for the first quarter under the operation of the reduced rates will not be settled before January next, and no reliable estimate of the receipts for the present year can yet be made. It is believed, however, that they will fall far short of those of the last year. The surplus of the revenues now on hand is, however, so large that no further appropriation from the Treasury in aid of the revenues of the Department is required for the current fiscal year, but an additional appropriation for the year ending June 30, 1853, will probably be found necessary when the receipts of the first two quarters of the fiscal year are fully ascertained.