The Navy In The Civil War
The Gulf And Inland Waters

Flag-Officer Davis had been relieved in command of the Mississippi flotilla on the 15th of October, by Commander David D. Porter, holding the local rank of acting rear-admiral. The new commander was detained in Cairo for two months, organizing and equipping his squadron, which had been largely increased. A division of vessels was still stationed at Helena, patrolling the lower river, under the command of Captain Henry Walke.

During the fall of 1862 and the following winter, two new types of vessels were added to the squadron. The first, familiarly called tinclads, but officially light-draughts, were river stern-wheel steamers purchased for the service after the suggestion of Flag-Officer Davis, and covered all round to a height of eleven feet with iron from half to three-quarters of an inch thick, which made them proof against musketry. The protection around the boilers was increased to resist the light projectiles of field artillery. They quartered their crew comfortably, and could on a pinch, for an expedition, carry 200 men. The usual battery for these vessels was six or eight 24-pound brass howitzers, four on each side, with sometimes two light rifled guns in the bows. This armament was of little use against works of any strength, but with canister or shrapnel could keep off the riflemen, and meet on equal terms the field artillery brought against