Columbia subject headings:
Emerson, P. H. (Peter Henry), 1856-1936.
Photography, Artistic.
Harvard subject headings:
Emerson, P. H. (Peter Henry), 1856-1936
Photographers--Great Britain--Biography
Photography, Artistic
Princeton subject headings:
Emerson, P. H. (Peter Henry), 1856-1936--Exhibitions.
Photography, Artistic.