1. MUS RP 6833 Reference (shelfmark): MUS RP 6833 Title: Scope & Content: Joseph Haydn manuscript of Piano Sonata in E flat. Sotheby’s sale 21 May 1999 lot 146. Creation dates: Undated Collection Area: Music Collections Languages: Undetermined Date Range: 10 Jun 1999 Extent: 15 photocopies