Secret ary ▁for ▁Ireland , ▁Sir ▁Matthew ▁Nathan , ▁on ▁ 1 7 ▁April , ▁but ▁without ▁reve aling ▁its ▁source , ▁and ▁Nathan ▁was ▁doubt ful ▁about ▁its ▁accuracy . ▁When ▁news ▁reached ▁Dublin ▁of ▁the ▁capture ▁of ▁the ▁Aud ▁and ▁the ▁arrest ▁of ▁Cas ement , ▁Nathan ▁con ferred ▁with ▁the ▁Lord ▁Lieutenant , ▁Lord ▁W im bor ne . ▁Nathan ▁proposed ▁to ▁ra id ▁Liber ty ▁Hall , ▁headquarters ▁of ▁the ▁Cit izen ▁Army , ▁and ▁Vol unte er ▁properties ▁at ▁Father ▁Matthew ▁Park ▁and ▁at ▁K imm age , ▁but ▁W im bor ne ▁ins isted ▁on ▁wh oles ale ▁arr ests ▁of ▁the ▁leaders . ▁It ▁was ▁decided ▁to ▁post p one ▁action ▁until ▁after ▁E aster ▁Monday , ▁and ▁in ▁the ▁meant ime ▁Nathan ▁te legraph ed ▁the ▁Chief ▁Secretary , ▁August ine ▁Bir rell , ▁in ▁London ▁seeking ▁his ▁appro val . ▁By ▁the ▁time ▁Bir rell ▁c abled ▁his ▁reply ▁author ising ▁the ▁action , ▁at ▁no on ▁on ▁Monday ▁ 2 4 ▁April ▁ 1 9 1 6 , ▁the ▁R ising ▁had ▁already ▁begun . ▁ ▁On ▁the ▁morning ▁of ▁E aster ▁Sunday , ▁ 2 3 ▁April , ▁the ▁Military ▁Council ▁met ▁at ▁Liber ty ▁Hall ▁to ▁discuss ▁what ▁to ▁do ▁in ▁light ▁of ▁Mac Ne ill ' s ▁counter m and ing ▁order . ▁They ▁decided ▁that ▁the ▁R ising ▁would ▁go ▁ahead ▁the ▁following ▁day , ▁E aster ▁Monday , ▁and ▁that ▁the ▁Irish ▁Vol unte ers ▁and ▁Irish ▁Cit