Published over a number of years, with the volume count growing. The present set is the first 22 volumes. The plates are numbered 1-894 (in roman numerals), but there are no plate nos. 102-140, 441, 478, or 677-680. The first four volumes contain plate nos. 100-101, Vol. V has no plates (with no signs of removal), and Vol. VI begins with plate 141. There are no signs of the other missing plates being removed as well.