In this sharp and decisive action the gunboats showed themselves well fitted to contend with most of the guns at that time to be found upon the rivers, provided they could fight bows on. Though repeatedly struck, the flag-ship as often as thirty-one times, the armor proved sufficient to deflect or resist the impact of the projectiles. The disaster, however, that befell the Essex made fearfully apparent a class of accidents to which they were exposed, and from which more than one boat, on either side, on the Western waters subsequently suffered. The fleet lost two killed and nine wounded, besides twenty-eight scalded, many of whom died. The Essex had also nineteen soldiers on board; nine of whom were scalded, four fatally.
The surrender of the fort was determined by the destruction of its armament. Of the twelve guns, seven, by the commander's report, were disabled when the flag was hauled down. One had burst in discharging, the rest were put out of action by the fire of the fleet. The casualties were few, not exceeding twenty killed and wounded.
Flag-Officer Foote, having turned over his capture to the army, returned the same evening to Cairo with three armored vessels, leaving the Carondelet. At the same time the three wooden gunboats, in obedience to orders issued before the battle, started up river under the command of Lieutenant Phelps, reaching the railroad bridge, twenty-five miles up, after dark. Here the machinery for turning the draw was found to be disabled, while on the other side were to be seen some transport steamers escaping up stream. An hour was required to open the draw, when two of the boats proceeded in chase of the transports, the Tyler, as the slowest, being left to destroy the track as far as possible. Three of the Confederate steamers, loaded with military stores, two of them with explosives, were run ashore and fired. The Union gunboats stopped half a mile below the scene, but even at that distance the force of the explosion shattered glasses, forced open doors, and raised the light upper decks.
The Lexington, having destroyed the trestle-work at the end of the bridge, rejoined the following morning; and the three boats, continuing their raid, arrived the next night at Cerro Gordo, near the Mississippi line. Here was seized a large steamer called the Eastport, which the Confederates were altering into a gunboat. There being at this point large quantities of lumber, the Tyler was left to ship it and guard the prize.