Notebooks of Richard Haldane containing notes on and for lectures and essays chiefly concerning philosophy., 1875-1921., MSS.20213-20219. Notebooks and other papers of Richard Burdon Haldane, Viscount Haldane, preceded by correspondence of and papers concerning his mother, Mrs Mary E Haldane and his maternal uncle, Sir John S Burdon-Sanderson, Baronet, and followed by notebooks and other papers of his sister Elizabeth S Haldane., MSS.20208-20229. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/45722 Accessed September 23, 2024.