The works of M. de Voltaire : Translated from the French. With notes, historical and critical. By T. Smollett, M.D. T. Francklin, M.A. and others. Volume the twenty-first. - Voltaire (Printed for W. Johnston, S. Crowder, T. Longman, Carnan and Newbery, G. Robinson, and R. Baldwin, 1774)