1. MUS RP 6852 Reference (shelfmark): MUS RP 6852 Title: Scope & Content: Ruggiero Leoncavallo: 2 Autograph letters signed. Sotheby’s sale 9 Dec 1999 lot no.152. Creation dates: Undated Collection Area: Music Collections Languages: Undetermined Date Range: 17 Dec 1999 Extent: 3 photocopies