Sean Heuston commanded the Volunteers at the Mendicity Institution. On Easter Wednesday morning, April 20, 1916 two Volunteer dispatchers slipped through some very dangerous areas to bring an urgent message to James Connolly from Hueston. He needed immediate backup, because he and 20 men were still holding out against several hundred British troops, who had Hueston's men just about completely surrounded. A major assault was expected at any time and supplies and food were just about gone.
Connolly was quite excited and Pearse said aid would be sent immediately to Heuston and his company. But almost immediately they found that it was impossible and that Hueston had been captured. Connolly had given orders to Heuston to hold up the British that were heading toward the Four Courts for 3-4 hours which would allow allow the garrison there as well as Headquarters to prepare their defenses. Connolly found out later that Heuston not only held his position for the few hours specified, but was still there after nearly 50 hours until he could hold out no longer.
Sean Heuston was shot on May 8.