I began to make inquiries about vulnerable points. I found the far-seeing Captain Hankey, then Assistant Secretary to the Committee of Imperial Defence, already on the move classifying them for the War Book, which project had actually been launched.[3] I inquired further about sabotage and espionage and counter-espionage. I came in touch with other officers working very quietly and very earnestly but in a small way and with small means. I was told about German spies and agents in the various British ports. Hitherto the Home Secretary had to sign a warrant when it was necessary to examine any particular letter passing through the Royal Mails. I now signed general warrants authorising the examination of all the correspondence of particular people upon a list, to which additions were continually made. This soon disclosed a regular and extensive system of German paid British agents. It was only in a very small part of the field of preparation that the Home Secretary had any official duty of interference, but once I got drawn in, it dominated all other interests in my mind. For seven years I was to think of little else. Liberal politics, the People’s Budget, Free Trade, Peace, Retrenchment and Reform—all the war cries of our election struggles began to seem unreal in the presence of this new preoccupation. Only Ireland held her place among the grim realities which came one after another into view. No doubt other Ministers had similar mental experiences. I am telling my own tale. I now began to make an intensive study of the military position in Europe. I read everything with which I was supplied. I spent many hours in argument and discussion. The Secretary of State for War told his officers to tell me everything I wanted to know. The Chief of the General Staff, Sir William Nicholson, was an old friend of mine. I had served with him as a young officer on Sir William Lockhart’s staff at the end of the Tirah Expedition in 1898. He wrote fine broad appreciations and preached a clear and steady doctrine. But the man from whom I learned most was the Director of Military Operations, General Wilson (afterwards Field-Marshal Sir Henry Wilson). This officer had extraordinary vision and faith. He had acquired an immense and, I expect, an unequalled volume of knowledge about the Continent. He knew the French Army thoroughly. He was deeply in the secrets of the French General Staff. He had been Head of the British Staff College. For years he had been labouring with one object, that if war came we should act immediately on the side of France. He was sure that war would come sooner or later. All the threads of military information were in his hands. The whole wall of his small room was covered by a gigantic map of Belgium, across which every practicable road by which the German armies could march for the invasion of France, was painted clearly. All his holidays he spent examining these roads and the surrounding country. He