GIBBON, Edward. The History of the Decline and Fall of the Roman Empire, London, for W. Strahan and T. Cadell, 1776-88, 6 vols., 4°, FIRST EDITION, vol. I second variant with X4 and a4 unsigned, half titles, engraved portrait frontispiece in vol. II, 2 folding maps (one with short split along fold), ownership inscription of "Sir John Sinclair" on front free endpapers of first 3 vols., contemporary ink annotation on title of vol. IV, contemporary calf gilt (worn, one cover lacking). [Norton 20, 23 and 29; Rothschild 942-944; PMM 222] (6)