The papers consist of personal and professional correspondence, writings, notes, teaching materials, subject files, audio tapes and other papers of Leonard J. Savage (1917-1971), mathematician, statistician, author, teacher, and professor at Yale from 1964-1971. The papers relate primarily to Savage's work in the field of statistics, especially Bayesian statistics, and includes extensive correspondence with many of his professional colleagues from around the world. Also included is a large collection of the writings of the Italian mathematician, Bruno de Finetti, material relating to an exhibit on "Animal Odorants" done for the Peabody Museum of Natural History, and the papers of I. Richard Savage and the Savage family.