- 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
- File58 - Letters from R. G. Nicholson
- Item1 - Autograph letter, signed, to J. R. Tanner from R. G. Nicholson, Cambridge
- Item2 - Autograph letter, signed, to J. R. Tanner from R. G. Nicholson, Cambridge