Armored vessels in the attack on Charleston. Letter from the Secretary of the Navy, in answer to Resolutions of the House and Senate in relation to the operations of armored vessels employed in the service of the United States
United States. Congress. House. Committee on Naval Affairs, 1864
Circular, embodying conditions that must be conformed to by those who submit designs to U.S. Navy Department in pursuanceof following advertisement: Notice to naval architects and others concerning designs of steel armored vessels for U.S. Navy