The Clark mss., 1909-1957, consists of the letters and writings of author, editor, and publisher Thomas Curtis Clark, 1877-1953, as well as the autographs and poems of other writers collected by him.
The Hansen, K. mss, 1950-1951, consists of letters from poet Wystan Hugh (W. H.) Auden, 1907-1973, to his German translator, Kurt Heinrich Hansen, 1913-1987.
The Wilson, R. A. mss. II, 1967-1979, consist of three albums of documents pertaining to the Oblong Octavo series published by R. A. Wilson of the Phoenix Book Shop.