This edition of Rousseau in twenty octavo volumes, compiled by Jacques-André Naigeon (who had previously produced the first collected edition of Diderot) and others, proclaimed itself to set new scholarly standards on the basis of its recourse to original manuscripts. This, the opening volume, contains a facsimile of a letter from Rousseau to Madame de Créquy of October 1751.
Rousseau, Jean-Jacques. Oeuvres de J.J. Rousseau: Citoyen de Genève. Paris: P. Didot, 1801. [Older Printed Books Collection]