London, Dec. 2 1926. 1 page, 10x8", folds, slightly soiled. "I am sending under separate cover the copy of Vol 11 of my book…The chapter dealing with 1917 is the one at fault…" Boldly signed by WR Robertson. Robertson was British Field Marshall, Quartermaster general of the British Expeditionary Force (1914), Chief of the General Staff of the B.E.F. (1915), Chief of Imperial General Staff (1915-1918), Commander in chief of the British Army on the Rhine (1919-1920).