Chapter I

, and also the editors of _The American Machinist_ and _The Engineer_ for allowing me to quote respectively from the following admirable articles: “The Forerunner of the Tank,” by H. H. Manchester, and “The Evolution of the Chain Track Tractor”; Sir Eustace Tennyson D’Eyncourt, K.C.B., Director of Naval Construction, the Admiralty, and Major-General E. D. Swinton, C.B., D.S.O., both pioneers of the tanks, and indefatigable workers in the cause, for much of the information in Chapters II and IV; Major H. S. Sayer, G.S.0.2, War Office,[2] for