The materials upon which the History is chiefly based are the official War Diaries in the possession of the Historical Section (Military Branch) of the Committee of Imperial Defence. To the officials at 2, Cavendish Square I am indebted for courtesy and assistance in matters of difficulty. I have made use also of a very large number of contributions sent to me by those who served with the Division, from Sir James Craig and Sir Oliver Nugent to several private soldiers. So long is the list that I cannot acknowledge my debt to these contributors by name, but I desire to thank one and all for material without which the record would have been bald and dry, material which has, I hope, enabled me to give some tinge of humanity to the History. In several cases these personal contributions have been of greater value still than this. They have--and this is true especially of the Retreat of March, 1918--furnished me with a record of incidents upon which official Diaries throw no light. Two such incidents, in particular, the defence of a company of the 12th Royal Irish Rifles at Le Pontchu Quarry, near St. Quentin, on March the 21st, and the last stand of the 2nd Royal Irish Rifles at Cugny, three days later, have hitherto gone unrecorded, because the survivors of these heroic episodes fell into the hands of the enemy. I have also to thank Sir Oliver Nugent, Colonel-Commandant W. M. Withycombe, C.B., C.M.G., D.S.O.; Brigadier-General C. J. Griffith, C.B., C.M.G., D.S.O.; Brigadier-General A. St. Q. Ricardo, C.M.G., C.B.E., D.S.O.; Major H. F. Grant Suttie, D.S.O., M.C., and Major J. C. Boyle for their trouble in reading the History in MS. and for their many helpful suggestions. The Honours List, a very big undertaking, is based almost entirely on the compilation of Mr. Andrew Jardin, M.S.M., formerly Chief Clerk in the Administrative Branch of Divisional Headquarters. In this and other matters connected with the History I have had much assistance from my wife. The most important acknowledgment, on behalf of the Committee and all interested in the publication of the work as well as on my own, is due to Captain Kenneth M. Moore, M.C., who acted as Honorary Secretary. The whole of the business side of the undertaking has been conducted by him. Into it he has thrown all his organizing ability and his enthusiasm. No appeal has been made to him in vain. I have only to add that it has been my endeavour to make this History not a mere record of battles, but, so far as space has permitted, a picture of life as it was lived in the days of war. Lacking the second, the first is like dry bones without flesh to cover them. If I have succeeded in combining the two, I have right to hope that I have made a contribution, however small, to history in a general sense, as apart from military history.