The O. B. Gilman and Sarah Dow Gilman Papers contain correspondence, including incoming letters and outgoing carbons relating to O. B. Gilman's businesses, 1915-1920s, and to Idhahurst Kennels, the Cocker Spaniel Breeders' Club of New England, and other dog breeding organizations, 1930s-1947, including correspondence with Leon F. Whitney, veterinarian, executive secretary of the American Eugenics Society, and donor of taxidermy mounts of show dogs to Yale University's Peabody Museum of Natural History; accounts and other papers relating to O. B. Gilman Specialty Biscuit Manufacturer, 1915-1919, the United Soda Fountain Company, 1920-1931, and the V. A. Nielsen Company, 1919-1927; breeding records, pedigrees, awards, and other records of Idahurst Kennels, 1890s-1940s; accounts, records of meetings, membership pins, award ribbons, and other papers relating to the Cocker Spaniel Breeders' Club of New England, 1920s-1940s, including printed catalogs and other records of shows, 1925-1944; show catalogs and newsletters of the American Spaniel Club and other dog breeding organizations, circa 1920s-1960s; photographs of the Gilmans and of dog shows, circa 1930s, and circa 150 photographs and drawings of cocker spaniels bred by the Gilmans and others, many annotated, circa 1880s-1940s; clippings, most relating to the Gilmans, Idahurst Kennels, and the Cocker Spaniel Breeders' Club of New England, 1920s-1940s; and other papers including glass negative photographic reproductions from Edward Topsell, Historie of foure-footed beasts (London: Iaggard, 1607).