Copies of letters (ff.265-6, 288-9), and part of a copy of a letter to Alexander Mackay, with memorandum concerning the recipient`s further geographical writings., 1867, MS.30014, folios 189-192, 265-266, 288-289. Papers of William Blackwood and Sons., MSS.30001-30984. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/29336 Accessed September 24, 2024.