Columbia subject headings:
Blake, William, 1757-1827--Exhibitions.
Mellon, Paul--Art collections--Exhibitions.
Harvard subject headings:
Art, English--18th century--Private collections--Exhibitions.
Art, English--19th century--Private collections--Exhibitions.
Blake, William, 1757-1827--Exhibitions.
Mellon, Paul--Art collections--Exhibitions.
Mellon, Paul--Art collections--vExhibitions.
Princeton subject headings:
Blake, William, 1757-1827--Exhibitions.
Mellon, Paul--Art collections--Exhibitions.