1. MUS RP 6872 Reference (shelfmark): MUS RP 6872 Title: Scope & Content: Ruggiero Leoncavallo: Two autograph letters signed. Sotheby’s sale 26 May 2000 lot no.155. Creation dates: Undated Collection Area: Music Collections Languages: Undetermined Date Range: 12 Jun 2000 Extent: 5 photocopies