Joseph Mary Plunkett   1887- 1916 Executed For Participation In 1916 Easter Rising AT G.P.O. Dublin   He was just twenty nine when he faced a firing squad at Kilmainhain Jail on the 4th May 1916 and he was granted permission to marry his sweetheart, Grace Gifford, on the eve of his pending execution. Joseph Mary Plunkett was a man of many great talents. The eldest son of George Noble Plunkett, Joseph was put through a good education and attended…