A 1983 interview with Werner F. Leopold (1896-1984), a key figure in the study of bilingualism and child language, is presented. An introductory section gives some background to the interview. The discussion itself reviews Leopold's personal and professional background, work, and writing, and focuses largely on the linguistic development of Leopold's daughter, on which much of his work was based. Mrs. Marguerite Leopold, Warner Leopold's wife, who was present at the interview, contributed several comments. (MSE)