battle of dublin british army british empire connolly youth movement county kerry dick mccormick dublin dublin castle dublin lockout dublin metropolitan police easter rising four courts francis sheehy-skeffington frongoch internment camp general post office harcourt street railway line howth hurling irish civil war irish national liberation army irish republican army irish republican brotherhood irish volunteers irish war of independence irish name james connolly james larkin killarney labour youth liberty hall mauser michael mallin provisional irish republican army red hand of ulster republican congress republican socialist youth movement trade union tralee william irwin thompson william martin murphy