The collection includes Troubridge's scrapbook album, 1889-1899; a pocket notebook; correspondence as President of the International Danube Commission, 1920-1924; correspondence from a variety of individuals, 1895-1921; and a volume listing his commission dates, entitled 'recollections in ranks'.

Administrative / biographical background
Entered the navy in 1875 at the Royal Naval College, Dartmouth, as a naval cadet, and promoted to lieutenant in 1884. Later in 1888 he received the silver medal of the Royal Humane Society after saving a persons life at sea. His next promotion was in 1895 to the position of commander and served in the battleship REVENGE (1896-8). He was later promoted to captain (1901) and became naval attache at Vienna and Madrid in 1902. He was naval attache at Tokyo (1902-4) and was present at the battle of Chemulpo and the operations off Port Arthur. Subsequently, Troubridge was awarded the Japanese order of the Rising Sun and on his return to England was made CMG and MVO. In 1907-8 he was made flag captain in the QUEEN, to Admiral Sir Charles Drury and then commodore at the royal naval barracks, Chatham between 1908-10. In 1910 Troubridge became private secretary to the first lord, Reginald McKenna, later Winston Churchill. In 1911, Troubridge was promoted to rear-admiral and chief of war staff in 1912. In Janaury 1913 he was given command of the cruiser squadron in the Mediterranean Fleet under Admiral Milne. The squadron comprised the armoured cruisers DEFENCE, BLACK PRINCE, DUKE OF EDINBURGH and WARRIOR. In 1915 Troubridge was appointed head of British naval mission in Serbia and in 1916 promoted to vice-admiral. In 1918 he was appointed admiral commanding on the Danube by the French commander-in-chief in the Balkans, General Franchet d'Esperey. He served as president of a provisional inter-allied Danube commission in 1919 and served as president on the permanent commission until 1924. Troubridge was promoted to Admiral in January 1919 and created a KCMG in the same year.