- CollectionCamb. Medieval History - Papers relating to the Cambridge Medieval History Series
- SeriesBox 1-2 - Letters to and from contributing historians to Cambridge Medieval History
- SubseriesBox 2 - Letters relating to historians M-W
- File59 - Letters from Charles Oman
- Item1 - Autograph letter, signed, to 'My Dear Sir', from Charles Oman, House of Commons
- Item2 - Autograph letter, signed, to J. R. Tanner from Charles Oman, Oxford
- Item3 - Autograph letter, signed, to J. R. Tanner from Charles Oman, Oxford
- Item4 - Autograph letter, signed, to J. R. Tanner from Charles Oman, Oxford
- Item5 - Autograph letter, signed, to J. R. Tanner from Charles Oman, Oxford
- Item6 - Autograph letter, signed, to J. R. Tanner from Charles Oman, Oxford