Two vellum-backed portfolio volumes (39 cm. x 29 cm.) with cloth boards and strings. Text and plates loose as issued. Portfolio spines slightly discoloured and a small tear at one head of spine. Else fine condition. Text and plates in near fine condition. Vol. I; 21 p.text + Index + "Table des planches" + 34 plates and 34 pages text. Every plate with additional text-page.Vol. II; (II), 38 plates with most often 1 p. text, sometimes 2 or 3 pages.