The Rousseau Collection was formed in the early 1950s from material already in the McGill library and from new acquisitions. It was created as a complement to the David Hume Collection. The collection now comprises some 254 first, early and variant editions of Rousseau's works and contemporary criticism and responses before 1801. As well, there many early nineteenth-century collected editions and other works and there later editions and criticisms and responses. There are a number of eighteenth-century English translations and some examples of Rousseau apocrypha, notably editions of Letters of an Italian Nun including one eighteenth-century American edition. There are also a dozen autograph letters and a contemporary manuscript copy of "Jean Jacques Rousseau, Citoyen de Geneve, à Christophe de Beaumont, archevêque de Paris" dated 1763. Records for the holdings are in the McGill Library on-line catalogue.