[Letter] [18??] May 18, Sheriff office, Glasgow (Scotland) / A. Alison.

Chicago citation style
Alison, Archibald, Sir, 1792-1867. [Letter] [18??] May 18, Sheriff office, Glasgow (Scotland) / A. Alison.. Retrieved from the Digital Public Library of America, http://cdm.lib.lehigh.edu/cdm/ref/collection/letters/id/313. (Accessed December 11, 2018.)
APA citation style
Alison, Archibald, Sir, 1792-1867, [Letter] [18??] May 18, Sheriff office, Glasgow (Scotland) / A. Alison.. Retrieved from the Digital Public Library of America, http://cdm.lib.lehigh.edu/cdm/ref/collection/letters/id/313
MLA citation style
Alison, Archibald, Sir, 1792-1867. Retrieved from the Digital Public Library of America <http://cdm.lib.lehigh.edu/cdm/ref/collection/letters/id/313>.
Note: These citations are programmatically generated and may be incomplete.