The Thirteen-Inch Mortar "Dictator"

Mortar Battery, Morris Island, S.C.

15-inch (i.e. 13-inch) mortar, "Dictator" in the works in front of Petersburg, Va. View from the north, September 1, 1864

Loading a trench mortar in a hillside dugout on the Serbian front

Trench mortar in its well-timbered chamber, view looking straight down

Fort Gregg, Morris Island, S.C. [Mortar battery ready to load.]

View of cannons and mortars.

General view of the Charlestown Navy Yard.

Navy Yard, Charlestown.