One of the most valuable parts of this archive, subseries 2 contains hundreds of letters written to F. W. Dupee and Barbara "Andy" Dupee throughout six decades, many by notable friends such as Mary McCarthy, Lillian Hellman, Edward W. Said, Delmore Schwartz, Sonia Orwell, Thomas Flanagan, Gore Vidal, Lionel Trilling, and others. Several of the letters include manuscripts and related materials from those authors. Dozens of condolences sent to Mrs. Dupee are included, as well as readings from the F. W. Dupee memorial. Many of the letters refer to professional matters, and attest to Dupee's work no less than to his social ties.