James Barnes, author of David G. Farragut, Naval Actions of 1812, Yank ee Ships and Yankee Sailors, Commodore Bainbridge , The Blockaders, and other naval and historical works, The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 6: The Navy.
Francis Trevelyan Miller, Ed.

The entire front wall was reinforced by enormous piles of sand-bags to enable its four feet eight inches of solid brick to withstand the broadsides of the fleet. Although the other fortifications at the entrance to Mobile Bay surrendered the day after the battle, it took more than Farragut's broadsides to reduce Fort Morgan. A siege-train had to be brought from New Orleans and a land attack made by the troops under General Gordon Granger, August, 22, 1864. Not till 3,000 missiles had been hurled into and around the Fort by the combined guns of the army and navy did the brave garrison of Fort Morgan surrender after a gallant defense of twelve hours. In the picture some of the damaging effects of the terrific gunnery of the fleet are evident in the sea wall.