1. MS Mus. 1804/1/12/1 Reference (shelfmark): MS Mus. 1804/1/12/1 Title: Thea Musgrave: 'Simón Bolívar', opera. Research and early versions of synopsis Collection Area: Music Collections Languages: English Date Range: 1988-1991? Extent: 2 volumes
2. MS Mus. 1804/1/12/4 Reference (shelfmark): MS Mus. 1804/1/12/4 Title: Thea Musgrave: 'Simón Bolívar', opera. Libretto drafts Collection Area: Music Collections Languages: English Date Range: 1989-1993 Extent: 5 volumes
3. MS Mus. 1804/1/12/6 Reference (shelfmark): MS Mus. 1804/1/12/6 Title: Thea Musgrave: 'Simon Bolívar', opera. Composition drafts Collection Area: Music Collections Languages: English Date Range: 1989-1992 Extent: 5 volumes
4. MS Mus. 1804/1/12/8 Reference (shelfmark): MS Mus. 1804/1/12/8 Title: Thea Musgrave: 'Simón Bolívar', opera. Full score Collection Area: Music Collections Languages: English Date Range: 1991-1992 Extent: 4 volumes
5. MS Mus. 1804/1/12/9 Reference (shelfmark): MS Mus. 1804/1/12/9 Title: Thea Musgrave: 'Simón Bolívar', opera. Vocal score Scope & Content: Vocal score, in ink on transparencies, with tape cues. Collection Area: Music Collections Languages: English Date Range: 1993 Extent: 3 volumes