The captain of Company C, John R. Brooke, recruited and became the colonel of the 53rd Pennsylvania which included the Madison Guards as its Company A. The 53rd, which began organizing in late September 1861, also went on to serve for the rest of the war with the Army of the Potomac. Company A Private George Morton Randall joined the Regular Army in the fall of 1861 and rose to major general after the end of the war. Corson returned to Norristown to finish his medical studies, interrupted by his service in the 4th Pennsylvania, and afterwards became assistant surgeon of the 6th Pennsylvania Reserves, receiving the Medal of Honor for his actions at the Battle of Bristoe Station.