1. Egerton MS 10-13 Reference (shelfmark): Egerton MS 10-13 Title: Letters to the Marquis de Chasteauneuf Scope & Content: A large collection of original letters, addressed to M. le Marquis de Chasteauneuf, while Keeper of the Seals of France, 1650, 1651. Collection Area: Western Manuscripts Languages: French Date Range: 1650-1651 Extent: 4 volumes