But to return to Jacopo; he had not been many months in Florence when he was placed by Bernardo Vettori with Leonardo da Vinci, and shortly afterwards with Mariotto Albertinelli, then with Piero di Cosimo, and finally, in the year 1512, with Andrea del Sarto, with whom, likewise, he did not stay long, for the reason that, after Jacopo had executed the cartoons of the little arch for the Servites, of which there will be an account below, it appears that Andrea never again looked favourably upon him, whatever may have been the reason. The first work, then, that Jacopo executed at that time was a little Annunciation for one his friend, a tailor; but the tailor having died before the work was finished, it remained in the hands of Jacopo, who was at that time with Mariotto, and Mariotto took pride in it, and showed it as a rare work to all who entered his workshop. Now Raffaello da Urbino, coming in those days to Florence, saw with infinite marvel the work and the lad who had done it, and prophesied of Jacopo that which was afterwards seen to come true. Not long afterwards, Mariotto having departed from Florence and gone to Viterbo to execute the panel-picture that Fra Bartolommeo had begun there, Jacopo, who was young, solitary, and melancholy, being thus left without a master, went by himself to work under Andrea del Sarto, at the very moment when Andrea had finished the stories of S. Filippo in the court of the Servites, which pleased Jacopo vastly, as did all his other works and his whole manner and design. Jacopo having then set himself to make every effort to imitate him, no long time passed before it was seen that he had made marvellous progress in drawing and colouring, insomuch that from his facility it seemed as if he had been many years in art.
Now Andrea had finished in those days a panel-picture of the Annunciation for the Church of the Friars of S. Gallo, which is now destroyed, as has been related in his Life; and he gave the predella of that panel-picture to Jacopo to execute in oils. Jacopo painted in it a Dead Christ, with two little Angels who are weeping over Him and illuminating Him with two torches, and, in two round pictures at the sides, two Prophets, which were executed by him so ably, that they have the appearance of having been painted not by a mere lad but by a practised master; but it may also be, as Bronzino says, that he remembers having heard from Jacopo da Pontormo himself that Rosso likewise worked on this predella. And even as Andrea was assisted by Jacopo in executing the predella, so also was he aided by him in finishing the many pictures and works that Andrea continually had in hand.