The collection has been arranged in five series:

SERIES I: General Correspondence (1952-1972).

SERIES II: Masters Family (November 1953-1967) consisting of correspondence with Edith Masters and her daughter Nancy who lived in Washington DC. Edith’s mother was part of the Booth family, and most of the correspondence concerns family matters as Edmund tried to be of help to the Masters’ family as they advanced in age. Some of this correspondence extended to Edith Master’s brother Stewart Lux Wirgman who lived in Delaware.

SERIES III: Pratt Family (1952-1973).

SERIES IV: Sarnoff Family (1952-1972) contains letters and audio tapes with Rick and Mary Sarnoff who lived in the St. Louis, Missouri, area. Rick Sarnoff was employed by Alsco of St. Louis who specialized in aluminum screens, storm windows and doors, and siding. Edmund also remained close with his two sons through letters and audiotapes.

SERIES V: Edmund Pratt Old Cars (1952-1962).

The collection generally includes a wide range of topics ranging from health issues, politics, religion, movies, economic conditions, weather, and family matters.