Series IV. Family and Other Papers contain correspondence, legal documents, deeds, and other papers of many other Choate family members as well as people unrelated to this Choate family. They are arranged chronologically. This series has been divided into three subseries. Subseries A. Related Choate Family Members contain papers of Choates who are related to this branch of the family. Subseries B. John Pearson and Hannah Badger contain papers of Abigail Parker Cosgwell Choate's relatives. Subseries C. Unrelated Papers contain various personal and legal papers of individuals whose connection to the Choates is unknown. It is possible that some of these papers belonged to George F. Choate's mentor, James Perkins.