The Gaufridy Collection includes 1,880 manuscript letters and documents received by the Marquis de Sade's estate manager, Gaspard Gaufridy, and other materials from the Marquis, his wife, and other correspondents during the last quarter of the 18th century. The correspondence primarily concerns the management of the de Sade family estates. Also present are draft transcriptions in modernized French prepared in the mid-1960s by University of Kansas faculty and their students.

"Correspondence secrète et familière de M. de Maupeou Chancelier de France avec M. de Sorhouet con[seill]er du nouveau Parlement." Correspondence of Mathieu François Pidansat de Mairobert, 1727-1779, copied into a volume.