A rich collection of graphic design prints, transparencies, sketches, mock-ups, and maquettes, as well as promotional materials (pamphlets, flyers, leaflets, brochures, advertisements) created by Erwin G. Harris and his design firm. Included within are commercial advertising materials for hotels, restaurants, and tourist attractions in Florida, other parts of the United States, Latin America, and the Caribbean; wines and spirits; and other companies, such as IGENE Biotechnology, Scopitone, and Mastro Plastics.

The collection also includes correspondence to and from Erwin G. Harris, photographs, advertisement proposals, resumes, biographies, portfolios and other documents pertaining to Harris and Company Advertising, and Inc. and Erwin G. Harris’ other businesses, along with legal documents, correspondence, and news clipping detailing Harris' feud with the Cuban government under Fidel Castro during the early 1960s.