Notebooks of Richard B Haldane containing the original text and a fair copy of a lecture on William Pitt the Younger, given by Haldane to the Philosophical Institution of Edinburgh, 16 February 1888., 1888., MSS.20216-20217. 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/42730 Accessed September 23, 2024.