The author was French military attacé in London from 1904 to 1912 and in this capacity took a direct part in many of the famous military conversations between England and France from 1905 to 1914. In the first part of his book he throws considerable light on the story of the negotiations, telling how the idea of a military understanding was taken up almost simultaneously by both sides. During the war the author acted as chief of the French mission attached to the British army. His account of the British contribution is ill-disposed and uncomplimentary. As the book was written in 1922 no use has been made of the official histories published in recent years, though these serve, in many points, to contradict the assertions of the writer.