- FondsLarmor - Papers of Sir Joseph Larmor
- SeriesLetters - Letters to and from Larmor
- SubseriesTo Larmor - Letters to Larmor
- FileHart (Misc) - Letters from John Henry Arthur Hart
- ItemHA7/2 - Autograph letter, signed, from Little Shelford
- ItemHA7/3 - Autograph letter, signed, from Little Shelford
- ItemHA7/4 - Autograph letter, signed, from St John's College Library
- ItemHA7/5 - Autograph letter, signed, from St John's College
- ItemHA7/6 - Autograph letter, signed, from Holt
- 3 more...