To Hannibal Hamlin 
Washington, D.C., February 28, 1865.
Sir: In reply to the resolution of the Senate, dated February 14, 1865, I transmit herewith a communication from the Secretary of War, forwarding a copy of the report of the court of inquiry in respect to the explosion of the mine in front of Petersburg. I am, sir, very respectfully, your obedient servant,
Hon. H. Hamlin ABRAHAM LINCOLN.
President United States Senate.