1. RP 439 Reference (shelfmark): RP 439 Title: Scope & Content: Blathwayt Papers. Letter from William Byrd to William Blathwayt. Sotheby's, 10 February 1970, lot 375 Creation dates: 1690 Collection Area: Western Manuscripts Languages: English Date Range: 14 Apr 1970 Extent: 1 photocopy