Press relating to William Blake collected by Peter Butter., 1965-1984., Acc.13634/61. Research papers and literary correspondence between Peter Butter and various correspondents relating to his work on Edwin and Willa Muir, William Blake, Francis Thompson and other writers., Acc.13634/1-77. National Library of Scotland Archives and Manuscripts Division. https://manuscripts.nls.uk/repositories/2/archival_objects/15315 Accessed May 10, 2024.