London: J.F. and C. Rivington [et al], 1785.. Sixth edition. 4to. (lxxii, 1030; ii, 1088) pp. Contemporary full tan calf, rebacked to style preserving early gilt lettered green morocco labels, marbled endpapers, a prior owner's signature to the front of each volume. Portrait frontispiece. Some sunning to the spines, occasional mild rubbing, a very nice set. Courtney & Smith, p.57. The sixth edition overall and the second in quarto, preceded by a Dublin quarto edition of 1775.