Etching, engraving, sulphur tint and open-bite etching and burnishing, 1749-50. 417x556 mm; 16½x22 inches, full margins. Fifth state (of 6); Robison's second edition, fourth issue through early printings of fifth edition, printed from the mid 1770s to circa 1835. From Carceri d'Invenzione. Hind 14; Robison 40.
