The records of the Charles W. Hoyt Company advertising agency span the years 1894-1973 with the bulk dating between 1909-1928. The collection primarily documents the founding and operation of the company, and to a lesser extent the personal activities of the Hoyt family (Charles, Effie, Winthrop, and Everett) and Winthrop's service during World War II in the U. S. Army Air Force. Materials include correspondence, scrapbooks, company publications and manuals, financial records, clippings, diaries, writings, drawings, photographs, house advertisements, Nazi medals, song lyrics, and printed material. Very little information exists in the collection concerning the Hoyt Company's clients. The only client advertisements that survive were produced for Merck and Co. The Hoyt company scrapbooks document some activities for clients including Arnold Bakers, Golden Blossom Honey, Jamaica Tourist Board, KLM, Stanley Home Products, the Charles B. Woolson Co. and the State of New Hampshire. The collection contains correspondence between family members as well as between the company and Merck and Co., the Charles B. Knox Co., and William Benton, one of the founders of the Benton and Bowles advertising agency. Another notable person mentioned in the collection is Hoyt Company employee Samuel Meek, who would go on to become an important executive for the J. Walter Thompson Company advertising agency. The collection is organized into the Company Series; the Family Series; and the Winthrop Hoyt World War II Series. Large-format items are located in the Oversize Materials.