The Mary True Dooley papers consist of materials relating to the Andrews and True families. The Andrews materials include correspondence to and from the Elisha Andrews family, deeds, tax materials, financial information, essays, and sermons written by Elisha. Some of the correspondence describes eighteenth century life in New York, the journey to Michigan, and early settler life in Michigan. There are also Anne Amelia Andrew's diary, letters, copied essays and the correspondence of her husband, Eleazer W. True.

Also included are deeds from Edward Lathrop, who was the brother of Elisha's wife. There also materials of Frank Lathrop True relating to his college days at Michigan Agricultural College (now Michigan State University) in the early 1900s. These relate to Alpha Zeta and Delphic Society and include a cadet promotion certificate, M.A.C. calendars, and materials for the Class of 1911 fiftieth reunion.

In addition is Mary True Dooley's dissertation, "The Andrews Bailiwick: A Geographic Study of Migration to and Settlement of Northern Macomb County, Michigan, 1810-1850," which refers to the family records, as well as describes her early family members.