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
History of the Labour Party (Ireland) war, Labour called off its congress in 1915. James Connolly was the only leading Labour figure to take part in the Easter Rising in 1916. His execution after the rebellion left the labour movement in some disarray. Liberty Hall, the physical symbol of the labour movement, was destroyed, and the files of the ITUCLP were seized. Many trade union leaders, in Dublin, who had not taken part in the Rising were interned, such as William O'Brien, but they were released later when the British realised that they had no direct involvement. Their absence allowed non-nationalist leaders to come to the