Correspondence; biographical forms; typescript biographical entries, often corrected and amended by the subjects; documents; proofs; memoranda; notecards; photographs; clippings of reviews; and other printed materials for the project with the working title "Who's Who in the American Theatre." The materials were assembled by Walter Rigdon, editor, and James H. Heineman, publisher, from 1963, when the first biographical forms were sent out, until 1969, when plans for a second edition were abandoned. The 1101 page volume which was published under the title "The Biographical Encyclopaedia & Who's Who of the American Theater" includes 3350 biographical entries for theater people and a necrology of 9000 names, playbills from 1959-1964, histories of theater buildings and theater groups, production records of Plays staged in New York since 1900, a theater bibliography of 600 entries, lists of awards, and lists of foreign productions. Among those for whom original materials were included are Truman Capote, John Dos Passos, Richard Eberhart, T.S. Eliot, Arthur Miller, Elmer RIce, and Virgil Thomson.