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
Easter Rising to be hopeless, they dispersed on Saturday morning. Many went home and were arrested following the rising, while others, including Mellows, went "on the run". By the time British reinforcements arrived in the west, the rising there had already disintegrated. The Easter Rising resulted in at least 485 deaths, according to the Glasnevin Trust. Of those killed: More than 2,600 were wounded; including at least 2,200 civilians and rebels, at least 370 British soldiers and 29 policemen. All 16 police fatalities and 22 of the British soldiers killed were Irishmen. About 40 of those killed were children (i.e. under 17