Served on board the U.S.S. Richmond in the attack on Port Hudson, 14 March 1863. Damaged by a 6-inch solid rifle shot which shattered the starboard safety-valve chamber and also damaged the port safety-valve, the fireroom of the U.S.S. Richmond immediately became filled with steam to place it in an extremely critical condition. Acting courageously in this crisis, Hickman persisted in penetrating the steam-filled room in order to haul the hot fires of the furnaces and continued this action until the gravity of the situation had been lessened.