The arrangement of the catalogued correspondence has not been modified. Although copies of some outgoing correspondence are included, the bulk of this subseries consists of incoming correspondence from a variety of persons and on a variety of topics including collecting, philanthropy, education and peace work. Also included are numerous notes, from prominent persons, thanking Plimpton for copies of the books he authored. Some correspondence is to and from Frances Taylor Pearsons, George Plimpton's first wife. Extensive outgoing correspondence from George Plimpton to Frances, and to their son, Francis, can be found here as well.