Engraved frontispiece and three plates all after Gravelot.
8vo. [1]f. x, 340pp. [2]ff. Contemporary calf, narrow gilt border, gilt and panelled back. 1767
First edition of this historical romance, a series of conversations on political and social systems. Chapter 15 advocates freedom of opinion and toleration in religious matters and caused the work to be condemned by the Sorbonne, thus drawing undue attention to a dull text.