The whole work comprises 3 volumes and a supplement (contained in this copy in vol. 3). This copy lacks the Introduction and Dedication; there is no title-page for the supplement, and none known in other copies. The work was originally issued in quarterly parts, although it was not until vol. II that the months of publication were shown instead of simply the year; typographic style sometimes differs from one part to another. Plates in vol. I have dates from 1795 to 1797; in vol. II, from 1798 to 1799; in vol. III, from 1800 to 1803, with the supplementary plates bearing dates from 1803 to 1814.