The papers of Howard Henderson, a J. Walter Thompson Co. advertising executive, span the years 1867 to 1978, although the bulk of the material dates from 1954 to 1960. The collection documents the history of the J. Walter Thompson Company (JWT). In particular it illustrates changes in the company's advertising philosophy through 1960; JWT's marketing strategies (especially the use of new findings in the fields of psychology, sociology, and anthropology); historical company and client relationships; structural relations and internal policies; analyses of advertising media; the company's adaptation to the changed business situation during World War II; and the career of Henderson and his deep personal involvement with clients, colleagues, and contacts outside of advertising. The material consists of correspondence, office files, memoranda, notes, account histories, advertisements, reports, charts, scripts, clippings, and printed materials. Clients represented include Andrew Jergens, Chesebrough-Pond's (1930s and 1940s especially), Eastman Kodak International, General Cigar, U.S. Playing Card Company (1930s and 1940s especially), NATO, Union Central Life Insurance, Arbuckle, U.S. Brewers Foundation, and Standard Brands (Fleischmann Yeast).