"Music When Soft Voices Die" words by Percy Bysshe Shelley, 3 manuscripts, 1924 September 12, Box: 3, Folder: 17. Leopold Mannes music manuscripts, MP-0012-01. The New School Archives. https://findingaids.archives.newschool.edu/repositories/3/archival_objects/51403 Accessed May 03, 2025.