1. RP 436 Reference (shelfmark): RP 436 Title: Scope & Content: Blathwayt Papers. Letter from the Duke of Marlborough to William Blathwayt. Sotheby's, 10 February 1970, lot 363 Creation dates: 1701 Collection Area: Western Manuscripts Languages: English Date Range: 19 Mar 1970 Extent: 2 photocopies