Postcard from Mary Margaret Macken to Hanna Sheehy Skeffington (1877-1946). Mary Margaret Macken apologizes for missing a lecture, writing that she received the invitation sent by Hanna Sheehy Skeffington after she had made other plans.Hanna Sheehy Skeffington, suffragette, nationalist, language teacher, was the widow of Francis Sheehy-Skeffington (who was summarily executed on 26 April 1916). She was active during the Rising, bringing food to the Volunteers in the G.P.O. and the College of Surgeons. Four days passed before she found out what had happened to her husband, Francis (1878-1916), and it wasn't until almost two weeks later that the full details of his execution emerged.