Within this series is correspondence relating to Harrigan's writing. The series is arranged chronologically except for one folder of short notes from Lee Goerner, Harrigan's editor at Knopf. Other correspondents of note include John A. Sterling, Wallace Stegner, A.C. Greene, Elmer Kelton and Gunnar M. Hansen. Within this series are a few materials relating to Harrigan's personal life. Of particular interest are swimming fins and underwater slate, still imprinted with faint notes from a scuba diving trip.
Arrangement is alphabetical by author.