Medium: engraving in the Crayon Manner (also know as the Chalk Manner). This rare and beautiful engraving by Louis-Marin Bonnet employed a technique used before the advent of lithography, using three plates (black, red chalk and white chalk) to achieve the soft and subtle effect of a chalk drawing. Size: 19 1/2 x 15 inches (plate) with margins; minor repair to the margin and a few areas of minor wear/creasing to the paper (in good condition overall for its age). Printed on laid paper in 1772.