The sources of information upon which I have had to mainly depend have been:--A very imperfect Official War Diary; my own letters; my memory; and a few contributions from former comrades. These last have been received from Major E. G. Glyde, Captains A. M. P. Montgomery, A. S. Isaac, N. W. Sundercombe, G. D. Shaw, T. O. Nicholls, and C. C. Flower. But more particularly am I indebted to Lieut. J. T. Blair, who placed at my disposal a considerable quantity of material which he had been at great pains to collect whilst in London. As regards photographs and maps: Valuable prints and drafts have been supplied by the Trustees of the Australian War Museum. Mr. C. E. W. Bean, the Australian War Correspondent and Official Historian, has very kindly lent me photographs from his private collection. Mr. E. L. Mitchell and Mr. W. Owen, both of Perth, have generously given unrestricted permission to reproduce from their negatives, and certain members, and relatives of members, have also contributed interesting specimens. For the map of the Australian Corps' Front on Gallipoli, and the plans and diagrams referring to Cairo, Tel-el-Kebir, and the Pyramid, I have especially to thank Captain E. A. E. Andrewartha of the Australian Staff Corps. The publication of the Nominal Rolls of Members of the Battalion has been made possible largely through the assistance of Major J. M. Lean, M.B.E., the Officer in Charge of Base Records, Melbourne. For historical data, descriptive matter, and a few other essentials, I have also consulted the following works:--Barrett and Deane ("The A.A.M.C. in Egypt"); Callwell ("The Dardanelles Campaign and its Lessons"); Ellis ("Story of the 5th Division"); Hamilton ("Gallipoli Diary"); Masefield ("Gallipoli"); "Military History of the Campaign of 1882 in Egypt" (official); Nevinson ("The Dardanelles Campaign"); Schuler ("Australia in Arms"); Sladen ("Oriental Cairo"); Woods ("Washed by Four Seas"), and several others the names of which I cannot now recall. I am also under a great obligation to J. S. Battye, Litt.D., B.A., LL.B., the General Secretary of the Public Library, whose invaluable advice has guided me through a pleasing but arduous task. HERBT. B. COLLETT. Public Library, Perth, W.A., June, 1922. CHRONOLOGY OF THE 28th BATTALION, A.I.F. 1914. August 4.--Declaration of War. 1915. April 1.--Formation of the 7th Infantry Brigade approved and Establishments issued. 16.--Orders issued in Western Australia for formation of 28th Battalion of Infantry at Blackboy Hill. Necessary action taken the same day. 23.--Lieut.-Colonel H. B. Collett appointed to command.