U.S. Frigate "Pensacola," off Alexandria, Va.

The original "Monitor" after her fight with the "Merrimac"

U.S. steamer "Massasoit," in James River, 1864

Admiral Dahlgren and staff on the "Pawnee"

Smoke-stack of the Rebel Ram "Virginia"

Captain Gillespie and officers of flagship Philadelphia, Charleston Harbor, S.C.

Gun-boats at Baton Rouge, La., March 1863

U.S.S. Kineo and Hartford (on right), March 1863

U.S.S. Genesee at Baton Rouge, La., March 1863

U.S. ironclad gunboat Essex

Rebel Ram Stonewall

Where prisoners were exchanged

Waiting for a load of exchanged prisoners at Aiken's Landing, James River, March, 1865

Two monitors and Old Ironsides firing on Sumter

Crew of Monitor, Hampton Roads, Va. 1862

East side.

Detail of a bas relief at the base of the Soldiers' and Sailors' Monument.