Notes of Peter Butter relating to George Mackay Brown ; press relating to George Mackay Brown collected by Peter Butter., Circa 1992-1996., Acc.13634/69. 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://nlssb.as.atlas-sys.com/repositories/2/archival_objects/15279 Accessed September 23, 2024.