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.

The Urban Environment League is a non-profit organization originally created in 1996 under the leadership and guidance of Gregory Bush, a professor at the University of Miami's History department and the Institute for Public History. The organization is dedicated to promoting safe and responsible practices in urban development in Miami-Dade through education and by advocating for environmental reform and legal protections for historical landmarks. Their records contain several issues of their internal newsletter, the Urban Forum; membership lists; minutes; correspondence; pamphlets; flyers; brochures; periodicals; research files on historical landmarks in Greater Miami, and urban planning; financial records; administrative files; ephemera; audio-visual materials (floppy disks and negatives); and legal files.

Research material from noted author and historian, Arva Moore Parks McCabe (1939-2020). Born in Miami, Florida, Arva had written countless books on Florida's eclectic history, including The Forgotten Frontier: Florida through the Lens of Ralph Middleton Munroe, Miami, the Magic City, and George Merrick, Son of the South Wind: Visionary Creator of Coral Gables. She also served as chief curator, interim director, and chair of the Coral Gables Museum.

This collection focuses heavily on George E. Merrick, Coral Gables, and other research topics used in her writings. It also features a large assortment of archival material: booklets, books, magazines, posters, photographs, negatives, pamphlets, postcards, maps, ephemera, newspapers, and guides about Miami and other notable cities and famous people related to South Florida.