1. MS Mus. 1804/1/13/1 Reference (shelfmark): MS Mus. 1804/1/13/1 Title: Thea Musgrave: 'Pontalba', opera. Libretto drafts Collection Area: Music Collections Languages: English Date Range: 2001-2002 Extent: 2 volumes
2. MS Mus. 1804/1/4/2 Reference (shelfmark): MS Mus. 1804/1/4/2 Title: Thea Musgrave: 'The Decision', opera. Draft Collection Area: Music Collections Languages: English Date Range: 1965 Extent: 3 volumes
3. 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
4. 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
5. 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
6. MS Mus. 1804/1/4/5 Reference (shelfmark): MS Mus. 1804/1/4/5 Title: Thea Musgrave: 'The Decision', opera. Main vocal score Collection Area: Music Collections Languages: English Date Range: 1965-1967 Extent: 3 volumes
7. MS Mus. 1804/1/8/4 Reference (shelfmark): MS Mus. 1804/1/8/4 Title: Thea Musgrave: 'A Christmas Carol', opera. Programmes and other materials Collection Area: Music Collections Languages: English Date Range: 1079 Extent: 2 volumes
8. 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
9. MS Mus. 1804/1/7/4 Reference (shelfmark): MS Mus. 1804/1/7/4 Title: Thea Musgrave: 'Mary, Queen of Scots', opera. Full score Collection Area: Music Collections Languages: English Date Range: 1973? Extent: 4 volumes
10. MS Mus. 1804/1/11/6 Reference (shelfmark): MS Mus. 1804/1/11/6 Title: Thea Musgrave: 'Harriet, the Woman Called Moses', opera. Full score Collection Area: Music Collections Languages: English Date Range: 1985-1986 Extent: 2 volumes