London: Boydell, 1785. First. hardcover. 50 copper engraved plates by John Spilsbury, protected with tissue, featuring exquisitely carved gems. The 2 letter press pages, title and list of plates are slightly foxed, but the plates are clean. Small 4to, simple 1/2 green morocco by Bayntun. London: John Boydell, circa 1785. Spine evenly faded, still a very good(+) copy. very good(+).