| Description | - Record of farm house and buildings: 1930: landlord J E Blackwall; tenant George Oakden
- Typescript: Reminiscences of the South African War 1900/1901, written on board the transport Mountford in July 1901 by 7410 Colour Sergeant Blackwall J E, Volunteer Mounted Infantry
- List of fixtures: 1933: at Allsopp's Farm , Biggin
- Correspondence and other documents: 1942-1945: tenancy of Old Farm, Biggin
- Correspondence and financial details: 1924: estate of Lucy Blackwall |