Of the appropriation made, there will remain in the treasury, after the settlement of outstanding accounts, about $3,500, which may be needed for contingent liabilities, and for sustaining the line already constructed, until provision by law shall be made for such an organization of a telegraphic department or bureau as shall enable the telegraph at least to support itself, if not to become a profitable source of revenue to the Government. I will conclude by saying, that I feel grateful for the generous confidence which Congress has thus far extended toward me and my enterprise; and I will cheerfully afford any further and more detailed information on the subject of the telegraph, when desired, and will be prepared to make and execute any desirable arrangements for the extension of it that Congress shall require. With great respect, your obedient servant, SAM. F. B. MORSE, _Superintendent of Electro Magnetic Telegraph._ To the Hon. McCLINTOCK YOUNG, _Secretary of the Treasury ad interim_. No. 16. _Letter from the Secretary of the Treasury, transmitting a letter from Professor Morse, relative to the Magnetic Telegraph, Dec’r 23, 1844._ TREASURY DEPARTMENT, _December 17, 1844_. SIR: In compliance with the request made in your letter of this date, in behalf of the Committee on Commerce of the House of Representatives, for information from this department upon the subject of “Morse’s telegraph,” I have the honour respectfully to transmit herewith a communication from Professor Morse, dated the 12th instant, containing specific information in regard to that work. I have the honour to be, very respectfully, your obedient servant, GEO. M. BIBB, _Secretary of the Treasury._ Hon. ISAAC E. HOLMES, _Chairman of Committee on Commerce, House of Representatives_. No. 17. _Letter from Prof. Morse to the Hon. G. M. Bibb._ WASHINGTON, _December 12, 1844_. SIR: I have the honour respectfully to submit some facts in relation to the electro magnetic telegraph, bearing upon the bill now before Congress, reported from the Committee on Commerce of the House, for the extension of the telegraphic line from Baltimore to New York.