Easter Rising in putting the rising off for only a day, although it greatly reduced the number of Volunteers who turned out. British Naval Intelligence had been aware of the arms shipment, Casement's return, and the Easter date for the rising through radio messages between Germany and its embassy in the United States that were intercepted by the Royal Navy and deciphered in Room 40 of the Admiralty. The information was passed to the Under-Secretary for Ireland, Sir Matthew Nathan, on 17 April, but without revealing its source, and Nathan was doubtful about its accuracy. When news reached Dublin of the capture
First Day of the Easter Rising First Day of the Easter Rising The first day of the Easter Rising, Monday, April 24, 1916, saw some 1,200 volunteer soldiers of the Irish Volunteers take over positions in the centre of Dublin, launching the week-long revolution known as the Easter Rising. The Volunteers' Dublin division was organized into four battalions. As a result of Eoin MacNeill's countermanding order all of them saw a far smaller turnout than originally planned. The 1st battalion under Commandant Ned Daly mustered at Blackhall Street, numbering about 250 men. They were to occupy the Four Courts and areas to the northwest to guard