The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 1: The Opening Battles.
Francis Trevelyan Miller, Ed.

River gunboats.

Lying at anchor in the Ohio River this little wooden gunboat is having the finishing touches put to her equipment while her officers and men are impatiently waiting for the opportunity to bring her into action. A side-wheel river steamer originally, she was purchased at Cincinnati by Commander John Rodgers in the spring of 1861 and speedily converted into a gunboat. Her boilers and steam pipes were lowered into the hold and the oaken bulwarks five inches thick which we see were put on her and pierced for guns. She got her first taste of fighting when, at Lucas Bend, she engaged the land batteries and a Confederate gunboat, September 10, 1861. She was present at Fort Henry in the second division of the attacking fleet, and also at Fort Donelson.

The adventurous gunboat Conestoga

The Tyler: a sister-ship of the Conestoga. She was present both at Fort Henry and Fort Donelson.