[Eric Mackay, 7th] Lord Reay [(1773-1847)], [London], to D. Robertson, Golden Square, Thursday July 30, 1831, Box: 1, Folder: 57. Spottiswoode & Robertson collection, MS 186. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/248852 Accessed March 02, 2025.