- 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 1 - Letters relating to historians A-L
- File35 - Letters from Ernest F. Jacob
- Item1 - Autograph letter, signed, to 'Dear Sir', from Ernest F. Jacob, Oxford
- Item2 - Autograph letter, signed, to J. R. Tanner from Ernest F. Jacob, Oxford
- Item3 - Autograph letter, signed, to J. R. Tanner from Ernest F. Jacob, Oxford