Letters from Marshall to his brother, John Eden Marshall (1864-1937), the Hon Mr Justice Marshall, Judge in Egyptian Court of Appeal, written throughout World War One, including chatty, if brief, descriptions of his service in Gallipoli, Salonika and Mesopotamia, where he became Commander in Chief of the Mesopotamian Expeditionary Force in Nov 1917, 1915-1919. The great bulk of the letters are therefore written from Mesopotamia, 1916-1919, and include Marshall's descriptions of the second Battle of Kut el Amara, Dec 1916; the advance to and the fall of Baghdad, Mar 1917, with impressions of the city; the Battle of Band-i-Adhaim, 30 Apr 1917; the building of railways and improvement of communications along the British front line; commentary on the progress of the war on the Western, Eastern and Southern fronts; commentary on the progress of the British forces under Gen Sir Edmund Henry Hynman Allenby on the Palestine front, 1917-1919; the clearance of Jebel Hamrin and the River Diyala, Mesopotamia, Oct 1917; the 'Dunsterforce' operation in Persia, 1918; the advance up the Euphrates and the taking of Hit and Khan Baghdadi, Mar-May 1918; the final offensive on the Tigris, Oct-Nov 1918, culminating in the signing of an armistice with the Turks on 30 Oct, 1918.

Papers, 1899-1937, and 1964-1966, including personal letters to Alice Townshend, Lady Townshend, and to Comtesse Cahen d'Anvers from FM Horatio Herbert Kitchener, 1st Earl Kitchener of Khartoum and Broome, 1906-1911, also single personal letters from Frederick Edward Grey Ponsonby, Assistant Private Secretary to Queen Victoria, 1899, FM Garnet Joseph Wolseley, 1st Viscount Wolseley, 1901, Brig Gen Sir William Riddell Birdwood, Bt, 1906, Christian Rudolf de Wet, Minister of Agriculture, Orange River Colony, South Africa, 1909, FM Frederick Sleigh Roberts, 1st Earl Roberts of Kandahar, Pretoria and Waterford, 1911-1912, Rt Hon George Nathanial Curzon, Lord Privy Seal, 1915, Rt Hon Herbert Henry Asquith, Prime Minister, 1916, Paul Cambon, French Ambassador to Court of St James's, 1916, Lt Gen Sir Philip Walhouse Chetwode, 7th Bt, Military Secretary, War Office, 1919, and others; letter from Alice Townshend, Lady Townshend, dated 1916, to Mrs Morland, mother of Capt Walter Edward Thomson Morland, Aide de Camp to Townshend and captured with him at Kut el Amara, Mesopotamia, with information on the safety of her son, with three photographs of Townshend and the POW accomodation in Constantinople, 1916; scrapbook of newspaper cuttings, 1916, on the Mesopotamian campaign and the defence and siege of Kut el Amara, with signed printed portrait of Mustafa Kemal Atatürk, 1937; file of research correspondence by Lt Col Arthur James Barker for The neglected war (Faber, London, 1967) and Townshend of Kut (Cassell, London, 1967), 1964-1966, including correspondence with Capt Sir (Thomas) Noël Arkell, FM Sir Claude John Eyre Auchinleck, Maj Gen George Osborne de Renzy Channer, Sir Reader (William) Bullard, Brig Kenneth Bredin Shakespear Crawford, Sir Ernest (William) Goodale, Capt Basil Henry Liddell Hart, Maj Gen Henry Hampden Rich, Col Clive Woodes Rogers, Col Eric Lechmere Stephenson, Countess Audrey de Borchgrave-Townshend, Brig Louis James Woodhouse.