Collection contains papers of Montrose Jonas Moses (1878-1933), drama critic, journalist, and author of works on American and European drama and on children's literature, principally relating to his career. Correspondence pertains to his work as a reader for Thomas Y. Crowell Company and for Little, Brown and Company; his activities as liason between Little, Brown and Company and several authors under contract to prepare works for publication; his participation in the affairs of the Authors Club of New York and the Drama League of America, both at the national and local levels; and his own literary projects. Beginning in 1915, there are carbon copies of outgoing correspondence.

Notebooks, clippings, research notes, drafts, some correspondence, and other papers relate to Margaret Anglin, Sir James Matthew Barrie, Phillip Barry, Ethel Barrymore, Sarah Bernhardt, Billie Burke, Heinrich Conreid, Owen Davis, John Drinkwater, Edwin Forrest, James A. Herne, Henrik Ibsen, Sir Rabindranath Tagore, and other playwrights and actors prominent in the 19th and early 20th centuries; American and British drama; children's literature; baseball; the entertainment of troops at U.S. Army camps during World War I; the costs of medical care; and the development of regional or "little" theaters.

Scrapbooks contain the majority of his articles clipped from the journals and newspapers in which they appeared. Other papers include lectures and speeches; copies of works by other writers; financial papers consisting chiefly of royalty statements from publishers recording the sales of Moses's books; transcripts of Moses's weekly radio programs broadcast from 1930 to 1934 on the National Broadcasting Company network and on a local New York station; photographs of prominent actors and authors and of scenes from various plays; pictures of camp life in the U.S. Army during World War I; theater programs; scrapbooks of clippings from playbills of the last quarter of the 19th century; scrapbook with clippings concerning Sarah Bernhardt; scrapbook of items relating to Thomas Jonathan Jackson, compiled by Jackson's wife; and Moses's copy of The Tales of Mother Goose (Boston: 1903) with marginalia and annotations written by Moses.

Correspondents include Winthrop Ames, Margaret Anglin, David Belasco, Henry Adams Bellows, May Friend Bennett, William Frederick Bigelow, Abbie Farwell Brown, Richard Eugene Burton, Royal Jenkins Davis, William Crowell Edgar, John Erskine, William Clyde Fitch, Daniel Frohman, Hamlin Garland, Norman Bel Geddes, Harley Granville Granville-Barker, Hilary Abner Herbert, Hamilton Holt, Roland Holt, Henry Arthur Jones, Charles Rann Kennedy, Frederick Koch, Percy MacKaye, James Brander Matthews, Edith Wynne Matthison, Langdon Elwyn Mitchell, Arthur Huntington Nason, Eugene Gladstone O'Neill, Charles Fulton Oursler, William Lyon Phelps, Elmer Rice, Charles William Taussig, Augustus Thomas, Carl Van Doren, Eugene Walter, Kate Douglas (Smith) Wiggin, Percival Wilde, and Stark Young.