A world preoccupied with the tremendous movements of mighty armies woke up one morning and rubbed its eyes in amazement to read that a rebellion had broken out in the capital of Ireland. How did it happen? What did it mean? What was the cause of it? These and similar questions were being asked, and those who were ready with an answer were very few indeed. The marvellous thing, a matter almost incredible of belief, is that it caught the Irish Government absolutely unawares. Their Secret Service Department might as well not have been in existence.