Having executed these works in six years, Guglielmo in the year 1537 made his way to Rome, where he was much recommended by his uncle Giovan Jacomo to the painter Fra Sebastiano Viniziano, his friend, to the end that he might recommend him, as he did, to Michelagnolo Buonarroti. Which Michelagnolo, seeing Guglielmo to be spirited and very assiduous in labouring, began to conceive an affection for him, and, before any other thing, caused him to restore some antique things in the Farnese Palace, in which he acquitted himself in such a manner, that Michelagnolo put him into the service of the Pope. Another proof of his powers had been seen already in a tomb that he had executed at the Botteghe Scure, for the most part of metal, for Bishop Sulisse, with many figures and scenes in low-relief--namely, the Cardinal Virtues and others, wrought with much grace, and besides these the figure of the Bishop himself, which afterwards went to Salamanca in Spain. Now, while Guglielmo was engaged in restoring the statues, which are now in the loggia that is before the upper hall in the Farnese Palace, there took place in the year 1547 the death of Fra Sebastiano Viniziano, who, as has been told, had administered the office of the Piombo. Whereupon Guglielmo, with the favour of Michelagnolo and of others, so wrought upon the Pope, that he obtained the said office of the Piombo, with the charge of executing the tomb of Pope Paul III, which was to be placed in S. Pietro. For this he availed himself in the model, with better design, of the scenes and figures of the Theological and Cardinal Virtues that he had made for the above-named Bishop Sulisse, placing at the corners four children in four partitions, and four cartouches, and making in addition a bronze statue of the said Pontiff seated, giving the benediction; which statue was seventeen palms high. But doubting, on account of the size of the casting, lest the metal might grow cold and the work therefore not succeed, he placed the metal in the vessel below, in such a way that it might be gradually sucked upwards. And with this unusual method that casting came out very well, and as clean as the wax, so that the very surface that came from the fire had no need at all to be polished, as may be seen from the statue itself, which was placed below the first arches that support the tribune of the new S. Pietro. On this tomb, which according to a design by his hand was to be isolated, were to be placed four figures, which he executed in marble with beautiful inventions according as he was directed by M. Annibale Caro, who had the charge of this from the Pope and Cardinal Farnese. One was Justice, which is a nude figure lying upon some draperies, with the belt of the sword across the breast, and the sword hidden; in one hand she has the fasces of consular jurisdiction, and in the other a flame of fire, and she is young in countenance, and has the hair plaited, the nose aquiline, and the aspect full of expression.