- FondsLarmor - Papers of Sir Joseph Larmor
- SeriesLetters - Letters to and from Larmor
- SubseriesTo Larmor - Letters to Larmor
- FileLeatham (Misc) - Letters from John Gaston Leathem
- ItemLE1/1 - Autograph letter, signed, from Belfast
- ItemLE1/2 - Autograph letter, signed, from ? to JL
- ItemLE1/3 - Autograph letter, signed, from Belfast
- ItemLE1/4 - Autograph letter, signed, from Cambridge
- ItemLE1/5 - Fragment of autograph letter, signed, from Cambridge
- ItemLE1/6 - Autograph letter, signed, from St John's College
- ItemLE1/7 - Autograph letter, signed, from St John's College