1. MUS RP 6999 Reference (shelfmark): MUS RP 6999 Title: Scope & Content: Ludwig van Beethoven. Autograph letter signed to Henriette Sontag praising her performance in the premiere of the ninth symphony. Sotheby’s sale 22 May 2003 lot no.17. Creation dates: Undated Collection Area: Music Collections Languages: Undetermined Date Range: 17 Jun 2003 Extent: 2 photocopies