Instructor English, Wesleyan University, 1934-1935. Instructor English and comparative literature Columbia Graduate School, 1935-1936, research fellow, 1936-1937. Curator rare books Princeton University Library, 1937-1942, editor-in-chief Library Chronicle, 1938-1942.
Guggenheim fellow, 1946-1947. Associate Professor of English, Princeton, 1947-1951, professor, 1951-1973, Holmes professor Belles-lettres, 1968-1973. Ford Foundation fellow, 1953-1954.
Guest lecturer Salzburg (Austria) Seminar in American Studies universities Ljubljana, Zagreb and Belgrade, Yugoslavia, U. Oslo, Norway, Hebrew Jerusalem, Israel. Trustee Princeton University Press, 1955-1960, chairman editorial board, 1959-1960.
Author: Robert Frost: A Chronological Survey of His Work, 1933. Edwin Arlington Robinson: A Catalogue of An Exhibition (with H. Bacon Collamore), 1935. Young Longfellow, 1939.
Fire and Ice: The Art and Thought of Robert Frost, 1942. The Navy Hunts the CGR 3070, 1944. Melville’s Quarrel with God., 1952.
A Comic Principle in Sterne, Meredith, Joyce, 1954. Robert Frost: A Critical Study, 1959. William Faulkner: An Introduction and Interpretation, 1963.
The Early Years (Melville Cane award 1967), 1966. Robert Frost: The Years of Triumph, 1970 (Pulitzer prize in biography 1971). Editor: Tilbury Town.
Selected Poems of Edwin Arlington Robinson, 1954. Selected Letters of Robert Frost, 1964. (with Edward Connery Lathem) Robert Frost, Farm-Poultryman, 1963, Robert Frost and the Lawrence, Massachusetts, High School Bulletin, 1966.
(with Benton Spruance) Moby Dick: The Passion of Ahab, 1968. (with Arnold Grade) New Hampshire’s Child: The Derry Journals of Lesley Frost, 1969.
Born April 3, 1906