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
Karl Radek Left, with which he had close links from his time in Germany, introducing him to Paul Levi at this time. He took part in the Zimmerwald Conference in 1915, siding with the left. During World War One, Radek engaged in polemics with Vladimir Lenin over the subject of the Irish Easter Rising of 1916; while Lenin was strongly enthusiastic about the Rising, seeing it as a blow to English imperialism, Radek disagreed. Basing his view on Theodore Rothstein (a Jewish emigre from the Russian Empire, living in London), he claimed that, what he called the "Sinn Féin movement" was petit-bourgeois