Letters dated 1909-1914 from FM Earl Haig, Chief of General Staff in India and Commander-in-Chief at Aldershot, including potential candidates for appointments and Indian Army policy including reorganisation and recruitment; letters dated 1914-1918 from Haig, General Officer Commanding 1 Corps and Commander-in-Chief, British Armies, France, referring to operations including Dardanelles, Verdun; letters dated 1914-1918 from FM Sir Henry Wilson, British military representative at SupremeWar Council, Versailles, including French war effort; correspondence dated 1915-1921 with FM Sir William Robertson, General HQ British Armies in the Field including shortage of supplies and troops; Kiggell's demi-official correspondence when Chief of General Staff, 1916-1919, with various commanders on subjects including administration, planned operations, supply of guns and ammunition to Belgium, France and Russia and staff appointments; recollections dated 1919 of Chantilly conference, Nov 1916, to consider planned operations in 1917.

Various military papers, mainly dating from the nineteenth century, including standing orders, despatches and a paper by Gen Sir Frederick Roberts on Russia, all probably collected by Archibald Philip Primrose, 5th Earl of Rosebery, 1805-1811, 1871-1885, 1918-1921. Correspondence and papers relating to Lt Gen Sir Robert Grant (see above), including material concerning his career, and correspondence from Gen Sir Henry Redvers Buller, 1900. Letters and papers of Charles John Cecil Grant, notably correspondence with Rosebery, mainly letters written whilst on active service on the Western Front, World War One, 1914-1927, French Gen Maxime Weygand, including comments on the Versailles Treaty and the death of French Marshal Ferdinand Foch, 1919-1948, and Lt Gen Sir Oliver William Hargreaves Leese, 3rd Bt, on military operations in Italy during World War Two, 1943-1944. Copies of diary entries and notes written by Charles John Cecil Grant whilst serving as a liaison officer to French Headquarters on the Western Front, World War One, Mar-Nov 1918.