The Correspondence series documents Quintero's overlapping personal and professional life. Letters to and from Nicholas Tsacrios concerning Quintero's affairs are included in this series. Notable correspondents include Liv Ullman, Ingrid Bergman, Tennessee Williams, Gloria Vanderbilt, Jason Robards and Brian Friel. Although the bulk of the correspondence is collected in this series, letters related to teaching appointments are scattered throughout the collection. Correspondence directly related to specific productions have been added to the Production materials.