Photograph album relating to his service with the Royal Naval Air Service, Gallipoli, 1915.

Papers and photographs, 1888-1924, 1972, mostly manuscript letters by Simpson-Baikie to his wife, Marion Evelyn Simpson-Baikie, Lady Simpson-Baikie, 1906-1919, including letters whilst on active service on the Western Front, Gallipoli, Salonika and Palestine, 1914-1918; four manuscript letters from Simpson-Baikie to his mother-in-law, Emilita Miller, 1904-1918, and three manuscript letters from Simpson-Baikie to his daughter, Jean Simpson-Baikie, 1917-1918. Also, manuscript letter from Gen Sir Ian Standish Monteith Hamilton to Jean Miller Hamilton, Lady Hamilton, asking her to inform Marion Evelyn Simpson-Baikie that Simpson-Baikie has been chosen to serve at Gallipoli, 1915; manuscript letter to Simpson-Baikie from Gen Sir Horace Lockwood Smith-Dorrien, Governor of Gibraltar, on adverse comments about Smith-Dorrien in 1914 (Spiers, London, 1919) by FM John Denton Pinkstone French, 1st Viscount of Ypres, 1920. Eleven photographs and two negatives relating to Simpson-Baikie's career, 1888-1920, including three photographs of Simpson-Baikie, 1888, [1904]; Lt Gen Horatio Herbert Kitchener, 1st Baron Kitchener of Khartoum, General Officer Commanding in Chief, South Africa, with his Aide de Camp, Lt Francis Aylmer Maxwell [1901]; Maj Gen Hubert Ion Wetherall Hamilton, Maj Gen General Staff, Mediterranean Command, 1911; Gen Sir Ian Standish Monteith Hamilton at Charing Cross station, London, on his departure for Gallipoli, 13 Mar 1915; aerial photograph of the French camp at Sedd el Bahr, Gallipoli, Turkey, 1915. Typescript letter to Jean Morley Kennerley (née Simpson-Baikie) from Professor Robert Clifford Walton concerning Smith-Dorrien, 1972.

Papers relating to Gallipoli (Faber and Faber, London, 1936), 1927-1967, principally comprising original typescript, [1936]; correspondence, 1927-1967, notably with Brig Gen Cecil Faber Aspinall-Oglander, 1933-1939, Gen Sir Ian (Standish Monteith) Hamilton, 1934-1941, Capt Sir Basil Henry Liddell Hart, 1936-1937, AF Sir Roger John Brownlow Keyes, Bt, 1934-1939, and Maj Gen Arthur Cecil Temperley, 1935-1939; newspaper cuttings, [1915]-1966, including reviews of Gallipoli, 1936-1937, and cuttings relating to the Gallipoli campaign, [1915]-1966; 'Gallipoli', [script of radio programme] by Val Henry Gielgud, 1936; photographs of Gallipoli taken by North, [1936]. Papers relating to North West Europe (HMSO, London, 1953), 1943-1961, including original typescript, [1953]; correspondence, 1944-1957, notably with Liddell Hart, 1953-1954, and FM Bernard Law Montgomery, 1st Viscount Montgomery of Alamein, 1954-1955; press cuttings, 1943-1961, comprising reviews of North West Europe, 1944-1945, dated 1953-1954, and cuttings relating to World War Two, dated 1943-1961; official US Government and HMSO publications relating to World War Two, 1945-1946. Papers relating to The Alexander memoirs (Cassell, London, 1962), dated 1941, 1945, 1946, 1948, 1959-1964, including draft copy, [1962], and published copy, 1962; correspondence, 1961-1964, notably with FM Harold Rupert Leofric George Alexander, 1st Earl Alexander of Tunis, 1961-1963, Liddell Hart, 1961-1962, and Montgomery, 1962; newspaper cuttings, 1945-1946, 1948, 1959-1963; photographs taken by North and Alexander on a visit to the Middle East and Italy, 1960. Other papers, [1931-1968], including articles by North, [1939-1966], notably concerning training, tactics and weaponry; correspondence, [1933-1960]; maps of UK and North West Europe, 1931-1944; press cuttings, 1939-1966, including reviews of Men Fighting (Faber and Faber, London, 1958), 1958-1959; 'Diary of the Belgian Campaign, May 1940', typescript text by AF Sir Roger John Brownlow Keyes, dated [1940].

Copies of papers relating to his life and career and other family members, 1911, 1915, 1932, comprising: letter from Lt Col Sir George Roos-Keppel, Chief Commissioner and Agent to the Governor General, North West Frontier Province, to the Secretary to the Government of India, Foreign Department, reporting the capture of a party of raiders at Tarnab and commending various army and police officers, including Michael Donlea, Inspector of Police, North West Frontier (brother of Patrick), for their services in the incident, 2 March 1911; photograph [of raiders referred to in the above letter, 1911]; press cuttings describing charge of 21Lancers at Shabkadr, Aug 1915; brief typescript account of opium production and the organisation of Opium Department, United Provinces of Agra and Oudh, 1932; copy of letter to Mrs Lucy Sophia Le Marchand (aunt by marriage of Patrick's wife) from Maj Cecil Allanson, 1/6 Gurkha Rifles describing the death of her son, Lt John Wharton Jones Le Marchand, Gallipoli, 1915.

Papers relating to his life and career, 1885-1941, including typescript volume entitled 'The story of the Egyptian campaign, 1885-1886', written in [1914]; two typescript volumes entitled 'My narrative of the South African War 1899-1902' and 'Second phase of the South African War' with sketch maps, notes and recommendations of awards for officers and men of 2 Mounted Infantry Corps, 1899-1900; reports, notes and correspondence, 1900-1912, relating to the future development of cavalry in the British Army, including typescript extracts from article by Maj Gen Sir Ian Monteith Hamilton on operations at Diamond Hill, Second Boer War, South Africa, Jun 1900, and correspondence with FM Rt Hon Frederick Sleigh Roberts, 1st Earl Roberts of Kandahar, Pretoria and Waterford, Lt Gen Sir Horace Lockwood Smith-Dorrien, Maj Gen Edmund Henry Hyman Allenby, Maj Gen Sir Edward Thomas Henry Hutton, and Lt Col Hubert De la Poer Gough, 1903-1910; typescript notes on cavalry tactics, equipment and history, entitled 'Letters from an old cavalry officer to his son', 1909; two typescript volumes entitled 'My narrative of the Great German War', an account of his service in World War One in Gallipoli and on the Western Front, 1914-1918, including 29 photographs and typescript table showing number of 29 Div casualties between 1915 and 1917; manuscript article by De Lisle entitled 'General Sir Archibald Wavell GCB: the unknown leader', 1941; typescript unpublished novel entitled 'The great recovery', 1941, based on De Lisle's experiences in World War One, 1914-1918.

The papers cover the period 1915-1978, and include papers on his service in World War One, in particular extracts from diary on Galliopoli offensive May 1915 and Allied raid on Zeebrugge, Apr 1918; correspondence, narratives of operations and photographs from service as Officer Commanding Sudan Camel Corps, 1927-1930; reports on defence of British Somaliland and accounts of Italian invasion of Somaliland from service as Officer Commanding Somaliland Camel Corps, 1937-1940; papers on service as Military Governor and Officer Commaning, British Somaliland, 1941-1943; papers on service as Officer Commanding Portsmouth Div Royal Marines, including narrative of Operation OVERLORD, 1943-1944; papers on service as Director of Combined Operations, India and South-East Asia, including notes on Operation LIGHTNING, 1944-1945; papers on service as Commander Chatham Group Royal Marines, including lecture notes1946-1948; unpublished manuscripts on aspects of Allied war effort in British Somaliland; papers on service as Honorary Colonel Somaliland Scouts, 1948-1958, and membership of Anglo-Somali-Society, 1960-1978.

Photographs relating to his naval career, 1912-1949, including photograph album containing photographs taken during his service on HMS BACCHANTE, 1914-1915, at Gallipoli, 1915, and in the North Sea, 1916-1918, Baltic Sea, 1918-1920, East Indies and East Africa, 1921-1924, China Station, 1932-1934, Mediterranean, 1941-1943; photographs of Allied landings at Sword Beach, Normandy, France, 1944. Two volumes of press cuttings relating to the publication of Bless our ship (George Allen and Unwin, London, 1958), 1958, The flowers of the sea (George Allen and Unwin, London, 1962), 1962 and 1971, and Salute the soldier, (George Allen and Unwin, London, 1966), 1966, and Gallipoli (George Allen and Unwin, London, 1975), 1975.

Papers relating to his service in the RN, [1914-1920], [1939-1945], principally comprising carbon copies of letters to his family describing his service at Gallipoli, 1915-1916, and in Salonika, Greece, 1916-1918; typescript texts, written in [1918-1975], principally comprising descriptive sketches of life in Salonika, 1916-1918, in Belgrade after the retreat of German and Austrian forces, 1918-1919, and in Budapest following Communist uprising led by Bela Hung Kun, 1919, written in [1918-1975]; typescript text by Harry W Frantz on Troubridge's work in Serbia and Hungary, 1915-1918, and as President of the Interallied Commission of the Danube, 1919-1920, written in 1920. Photographs relating to his service in Gallipoli, 1915, Salonika, 1915-1918, Belgrade, 1918-1919, and press photographs of the Communist revolution in Budapest, 1919-1920. Glass slides relating to his service in Salonika, 1915-1918. Papers relating to Burrows' work in the Shipping Casualties Section, Trade Division, Admiralty, 1939-1945, principally comprising descriptions of the work of the section, official reports concerning sunk or damaged ships and texts of interview with survivors.