1. MS Mus. 1231 Reference (shelfmark): MS Mus. 1231 Title: Stephen Oliver: 'Slippery Soules'. Full score (1988 version) Scope & Content: 1988 orchestration. Written in pencil, with many amendments pasted in. Collection Area: Music Collections Languages: English Date Range: 1988 Extent: 1 volume (925 folios)