- FondsJeffreys - Papers and correspondence of Sir Harold Jeffreys
- SeriesA1-A230 - Biographical Papers
- FileA227-230 - Washington History Society plaque
- ItemA227 - Typescript letter, signed, from Andrea Kirby on behalf of the Washington History Society to the Master and Fellows of St John's College.
- ItemA228 - Commemorative pen
- ItemA229 - Photographs of the unveiling of a plaque in Fatfield
- ItemA230 - Local recognition at last for Harold