Columbia subject headings:
Authors, English--20th century--Correspondence.
Powys, John Cowper, 1872-1963--Correspondence.
Trovillion, Hal W., 1879-1967--Correspondence.
Trovillion, Violet, 1890-1979--Correspondence.
Harvard subject headings:
Authors, English--20th century--Correspondence
Powys, John Cowper, 1872-1963--Correspondence.
Trovillion, Hal W., 1879-1967--Correspondence.
Trovillion, Violet, 1890-1979--Correspondence.
Princeton subject headings:
Authors, English--20th century--Correspondence.
Powys, John Cowper, 1872-1963--Correspondence.
Trovillion, Hal W., 1879-1967--Correspondence.
Trovillion, Violet, 1890---Correspondence.