Military Operations, France and Belgium, 1917. The German Retreat to the Hindenburg Line and the Battles of Arras. Compiled by Captain Cyril Falls ... Maps and Sketches Compiled by Major A.F. Becke. (There Took Part in the Compilation of the First Draft of this Volume: Lieut.-Colonel C. Hordern, Early Chapters: Captain G.C. Wynne, Throughout.).