The collection contains rich correspondence (1886-1964), which includes letters of condolence on the deaths of his mother (d.1900) and his only son in 1909 (the latter includes a letter from Philip Snowden), letters about his applications to become a Methodist minister, letters from relatives in New Zealand, letters about his election to the seat of North Camberwell in 1935, letters from Clement Atlee 1943-1953, letters congratulating him on his peerage in 1944, letters during and just after the second world war which include those from his time as Captain of the Gentlemen-at-Arms, two from Winston Churchill and several with the Home Office and Lord Salisbury, letters about the dock strike of 1949 including one from Clement Atlee, letters about his personal affairs such as his golden wedding anniversary and his illness in the 1950s and miscellaneous correspondence including letters from Benno Elkan, J Keir Hardie, Ramsay Macdonald, Sir Robert Bruce, G D H Cole, Herbert Samuel, Sydney Webb, Walter Runciman, Henry Oliver, Stanley Baldwin, Lord Reith, Randolph Churchill, William Temple, Lloyd George, Anothony Eden, J S Amery, Ernest Bevin and Herbert Morrison. There are also a few family letters and postcards and 200 letters of condolence to the Honourable Ada Ammon about his death.
The collection also contains diaries and journals (1920-1956) which comprise desk diaries and travel journals for trips to America, Germany and Belgium, Newfoundland and Jamaica; press cuttings (1920-1958) most of which are pasted into diaries including cuttings about his 1942 trip to Newfoundland and his 1943 trip to China; a section of papers on docks (1941-1956) which includes speeches, printed material and extracts from Hansard; papers relating to the parliamentary mission to Newfoundland (c.1920-1945) including historical printed material, reports, correspondence and press cuttings; photographs and drawings (1890-1971) including personal photographs and family photographs, photographs of Lord Ammon with Benno Elkan, Ernest Bevin and others, an album mostly of the West African Commission 1938 and a drawing of R H Tawney; programmes and invitations (1935-1953) largely relating to royal events; papers relating to the West African Commission (1933-1939) including maps and publications; writings (1924-1957) being articles written by Lord Ammon, his autobiography written circa 1957 and three short family anecdotes by Ada Ammon; miscellaneous material (1886-1960) including family material, funeral cards, a passport, menus, a manuscript poem about the first world war, some election material for North Camberwell, some programmes and badges.