- 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
- File64 - Letters from H. Pirenne
- Item1 - Autograph letter, signed, in French, to J. R. Tanner from H. Pirenne, Sart lez Spa
- Item2 - Autograph letter, signed, in French, to 'Cher Monsieur', from H. Pirenne, Gaud
- Item3 - Autograph letter, signed, in French, to Dr Tanner from H. Pirenne, Gaud
- Item4 - Autograph letter, signed, in French, to Dr Tanner from H. Pirenne, Gaud
- Item5 - Autograph letter, signed, in French, to Dr Tanner from H. Pirenne, Gaud
- 6 more...