The sites for marine hospitals on the rivers and lakes which I was authorized to select and cause to be purchased have all been designated, but the appropriation not proving sufficient, conditional arrangements only have been made for their acquisition. It is for Congress to decide whether these Conditional purchases shall be sanctioned and the humane intentions of the law carried into full effect. The Navy, as will appear from the accompanying report of the Secretary, has been usefully and honorably employed in the protection of our commerce and citizens in the Mediterranean, the Pacific, on the coast of Brazil, and in the Gulf of Mexico. A small squadron, consisting of the frigate Constellation and the sloop of war Boston, under Commodore Kearney, is now on its way to the China and Indian seas for the purpose of attending to our interests in that quarter, and Commander Aulick, in the sloop of war Yorktown, has been instructed to visit the Sandwich and Society islands, the coasts of New Zealand and Japan, together with other ports and islands frequented by our whale ships, for the purpose of giving them countenance and protection should they be required. Other smaller vessels have been and still are employed in prosecuting the surveys of the coast of the United States directed by various acts of Congress, and those which have been completed will shortly be laid before you. The exploring expedition at the latest date was preparing to leave the Bay of Islands, New Zealand, in further prosecution of objects which have thus far been successfully accomplished. The discovery of a new continent, which was first seen in latitude 66° 2' south, longitude 154° 27' east, and afterwards in latitude 66° 31' south, longitude 153° 40' east, by Lieutenants Wilkes and Hudson, for an extent of 1,800 miles, but on which they were prevented from landing by vast bodies of ice which encompassed it, is one of the honorable results of the enterprise. Lieutenant Wilkes bears testimony to the zeal and good conduct of his officers and men, and it is but justice to that officer to state that he appears to have performed the duties assigned him with an ardor, ability, and perseverance which give every assurance of an honorable issue to the undertaking. The report of the Postmaster-General herewith transmitted will exhibit the service of that Department the past year and its present condition. The transportation has been maintained during the year to the full extent authorized by the existing laws; some improvements have been effected which the public interest seemed urgently to demand, but not involving any material additional expenditure; the contractors have generally performed their engagements with fidelity; the postmasters, with few exceptions, have rendered their accounts and paid their quarterly balances with promptitude, and the whole service of the Department has maintained the efficiency for which it has for several years been distinguished.