1. MS Mus. 1245 Reference (shelfmark): MS Mus. 1245 Title: Stephen Oliver: 'Perseverance' Scope & Content: Opera; December 1973-March 1974. Full score. Dated 3 March 1974 at end. Collection Area: Music Collections Languages: English Date Range: 1973-1974 Extent: 1 volume (205 folios)