- 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
- File70 - Letters from Eileen Power
- Item1 - Autograph letter, signed, to Dr Tanner from Eileen Power, London
- Item2 - Autograph letter, signed, to Dr Tanner from Eileen Power, London
- Item3 - Autograph letter, signed, to Dr Tanner from Eileen Power, Cambridge
- Item4 - Autograph letter, signed, to Dr Tanner from Eileen Power, London