Columbia subject headings:
Harvard subject headings:
Manuscripts--Scotland--Catalogs.
Naturalists--Scotland--Correspondence--Catalogs.
Thompson, D'Arcy Wentworth, 1860-1948--Archives--Catalogs.
University of St. Andrews. Library--Catalogs.
Princeton subject headings:
Scientists--Great Britain--Correspondence--Indexes.
Smart, R. N. (Robert Noyes)
Thompson, D'Arcy Wentworth, 1860-1948--Dictionaries, indexes, etc.