Notes of Peter Butter concerning ‘The Complete Poems of Edwin Muir’, edited by Peter Butter., Circa 1988-1997., Acc.13634/18-23. 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/15302 Accessed May 04, 2024.