Not otherwise than worthy of praise, also, is the method that has been invented of making engravings more easily than with the burin, although they do not come out so clear--that is, with aquafortis, first laying on the copper a coat of wax, varnish, or oil-colour, and then drawing the design with an iron instrument that has a sharp point to cut through the wax, varnish, or colour, whichever it may be, after which one pours over it the aquafortis, which eats into the copper in such a manner that it leaves the lines of the design hollow, and impressions can be taken from it. With this method Francesco Parmigiano executed many little things, which are full of grace, such as the Nativity of Christ, a Dead Christ with the Maries weeping over Him, and one of the tapestries executed for the Chapel after the designs of Raffaello, with many other works. After these masters, fifty sheets with varied and beautiful landscapes were produced by Battista, a painter of Vicenza, and Battista del Moro of Verona. In Flanders, Hieronymus Cock has executed engravings of the liberal arts; and in Rome, engravings have been done of the Visitation in the Pace, painted by Fra Sebastiano Viniziano, of that by Francesco Salviati in the Misericordia, and of the Feast of Testaccio; besides many works that have been engraved in Venice by the painter Battista Franco, and by many other masters. But to return to the simple copper-plate engravings; after Marc' Antonio had executed the many works that have been mentioned above, Rosso arrived in Rome, and Baviera persuaded him that he should have some of his works engraved; wherefore he commissioned Gian Jacopo Caraglio of Verona, who was one of the most skilful craftsmen of that day, and who sought with all diligence to imitate Marc' Antonio, to engrave a lean anatomical figure of his own, which holds a death's head in the hand, and is seated on a serpent, while a swan is singing. This plate succeeded so well, that the same Rosso afterwards caused engravings to be made, on plates of considerable size, of some of the Labours of Hercules: the Slaying of the Hydra, the Combat with Cerberus, the Killing of Cacus, the Breaking of the Bull's Horns, the Battle with the Centaurs, and the Centaur Nessus carrying off Deianira. And these plates proved to be so beautiful and so well engraved, that the same Jacopo executed, likewise after the design of Rosso, the story of the daughters of Pierus, who, for seeking to contend with the Muses and to sing in competition with them, were transformed into crows.