Diary, 17 Sep-16 Oct 1944, covering his service at Battle of Arnhem (Operation MARKET GARDEN), with part of 'Suggested medical plan' prepared for Deputy Director of Medical Services, 1 Airborne Corps, 22 Sep 1944, and part of note relating to the strength of medical forces, [1944]. Transcript of part of above diary made by Sir Basil Liddell Hart, with related correspondence, 1949-1951. Bound transcript of above diary made by Lt Col Kenneth Garside, Honorary Keeper of the Liddell Hart Centre for Military Archives, with foreword by Warrack, 1979. The diary formed the basis of Warrack's book Travel by dark: after Arnhem (Harvill, London, 1963), and a BBC television production Arnhem: the story of an escape, originally broadcast in 1976. Typescript copy of 'The Airborne Hospital, Willem 111 Kazerne, Apeldoorn, 25th Sept 1944 to 26th Oct 1944. Nominal roll of the wounded' compiled by Peter H Starling, Curator of the Army Medical Services Museums, Aldershot, Hampshire, 1998.

Papers, [1944]-1997, accumulated by Gen Sir John Winthrop Hackett. The bulk of the material (125 boxes) comprises Hackett's papers, 1958-1997, including official and personal correspondence, texts of lectures, press cuttings and published material. The papers range over Hackett's career and interests, the subjects including his official posts as Commandant, Royal Military College of Science, Shrivenham, 1958-1961, Deputy Chief of the General Staff, 1963-1964, and Commander in Chief, British Army of the Rhine, 1965-1966; King's College London and other academic institutions; his lecture 'The profession of arms' and other conferences, lectures and speeches, including Kermit Roosevelt lecture tour, 1967; publications including I was a stranger (1977) and Third World War (1978); UK and overseas military associations and institutions, including the Queen's Royal Irish Hussars and Queen's Royal Hussars, Royal Electrical and Mechanical Engineers, Royal United Services Institution, Institute of Strategic Studies; annual memorial visits to Arnhem. A smaller accession (5 boxes) comprises papers and correspondence, largely typescripts and printed material, accumulated by Hackett on military matters, largely but not wholly pertaining to the 1980s and including, for example, news cuttings, correspondence and conference papers on nuclear proliferation and debate on the issues; some material relates to Hackett's Warfare in the ancient world , published in 1989. Another accession (1 box) comprises typescript essays with related papers, photographs and plans concerning the Battle of Arnhem collected by Lt Col Theodore A Boeree, including extracts from the diary of Miss Riek van der Vlist, [1944], kept at Hotel Schoonard, the temporary British hospital during the Battle of Arnhem; a file of press cuttings on various military matters, 1968-1970; press article by Gen Hackett on Arnhem, 1974; two letters between Hackett and Dr Hedwig Delekat of Mainz, Germany, Jul-Aug 1968, concerning the fact that Hackett had no connection with Gen Halket, who served under Wellington. The collection also includes various military periodicals (27 boxes).

Collection includes five postcards, four of which are of British troops from 1 Airborne Div at Hotel De Tafelberg, Oosterbeek, Netherlands, during Operation MARKET GARDEN, the Allied attempt to establish a bridgehead across the Rhine river at Arnhem, 17 Sep-25 Sep 1944, and one of the Airborne Monument at Oosterbeek, built by J Maris, 1946; and a personal account by Henk B van der Horst entitled, Paratroopers Jump, Fury over Arnhem (Boekhandel Romijn, Oosterbeek, 1946), relating to the Allied airborne offensive at Arnhem, 17 Sep-25 Sep 1944.