1. Add MS 23913 Reference (shelfmark): Add MS 23913 Title: Anthem for twelve voices, by William Horsley. Scope & Content: ff. 30. ‘O Lord God of my salvation,’ Psalm 88, for 12 voices, with organ accompaniment, in score, by W. Horsley. Collection Area: Music Collections Languages: English Date Range: 19th century Extent: 1 volume (30 folios)