Columbia subject headings:
Art and science.
Art.
Authors, English--19th century--Correspondence.
Geology.
Letters to the editor--Great Britain.
Ruskin, John, 1819-1900--Correspondence.
Harvard subject headings:
Art
Art and science
Authors, English--19th century--Correspondence
Geology
Letters to the editor--Great Britain.
Ruskin, John, 1819-1900--Correspondence.
Princeton subject headings: