We return our sincere thanks to Mr. George Mathiot, the eminent Electrotypist, and T. A. Jenkins, Esq., Secretary of the Lighthouse Board, for a copy of the "Report on Lighthouses," by the Commissioners appointed by Government; also for the reply of the Commission to the Fifth Auditor, who formerly had control of the inefficient old system; also for a copy of a report containing a list of the lighthouses, lighted beacons, and floating lights in the United States. These documents are of great use to us, and the-gentlemen who have favored us with them have not only conferred a favor upon us, but will thereby be the means of doing good to others.