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 tin-clad “Marmora” and ram “Vinicator”

This little “tin-clad” Number 2, the “Marmora,” under Acting Volunteer Lieutenant Robert Getty, played a lively part in the operations of Admiral Porter's squadron against Vicksburg. She and the “Signal” were the “tin-clads” that reconnoitered up the torpedo-infested Yazoo, Dec. 11, 1862, and it was while protecting the “Marmora” from the Confederates along the bank that the luckless “Cairo” met her fate. The “Marmora” was with the fleet in Sherman's futile attack at Chickasaw Bayou. After the fall of Vicksburg, the squadron was divided into detachments to patrol the Mississippi and its tributaries, and the “Marmora” was assigned to the detachment of Lieutenant George M. Bache, the brave commander of the lost “Cincinnati.” He, in the little veteran “Lexington,” accompanied by the “Cricket” and “Marmora,” went up the White River where the Confederates were massing. In the middle of August, 1863, the three little gunboats completely broke up the expedition that was being set afoot by the indefatigable General Price, whom it would have required an army of 20,000 to drive back. The pontoon-bridges in the river were destroyed, completely stopping the advance, and the “Cricket” captured the two vessels in his flotilla.

A besieging “tin-clad” --the “Marmora”

The ram “Vindicator” off Vicksburg