Copies of letters of William Davidson to his grandson, William, volume II., 1861, undated., MS.10499. Copies of letters of William Davidson, the phrenologist and father of Thomas (1817-1885), the palaeontologist, to his grandson, William, 'Written at Heidelberg, and other places on the Rhine'., MSS.10498-10499. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/23070 Accessed September 23, 2024.