Pope Clement VII offers Michelangelo a pension in order to retain his services. It appears that Michelangelo only asked for fifteen ducats a month, and that his friend Pietro Gondi had proposed twenty-five ducats. Fattucci rebuked him in affectionate terms for his want of pluck, informing him that "Jacopo Salviati has given orders that Spina should be instructed to pay you a monthly provision of fifty ducats." Moreover, all the disbursements made for the work at S. Lorenzo were to be provided by the same agent in Florence, and to pass through Michelangelo's hands. A house was assigned him, free of rent, at S. Lorenzo, in order that he might be near his work. Henceforth he was in almost weekly correspondence with Giovanni Spina on affairs of business, sending in accounts and drawing money by means of his then trusted servant, Stefano, the miniaturist.
Symonds, John Addington: "The Life of Michelangelo Buonarroti", Modern Library (New York), p.239
Two important letters from Michelangelo to Fattucci, written in October 1525 and April 1526, show that he had then abandoned the original scheme (for the Medici tombs), and adopted one which was all but carried into effect.
I am working as hard as I can, and in fifteen days I shall begin the other captain. Afterwards the only important things left will be the four rivers. The four statues are on the sarcophagi, the four figures on the ground which are the rivers, the two captains, and Our Lady, who is to be placed upon the tomb at the head of the chapel; these are what I mean to do with my own hand. Of these I have begun six; and I have good hope of finishing them in due time, and carrying the other forward in part, which do not signify so much.
The six he had begun are clearly the Dukes and their attendant figures of Day, Night, Dawn, Evening. The Madonna, one of his noblest works, came within a short distance of completion. SS. Cosimo and Damiano passed into the hands of Montelupo and Montorsoli. Of the four rivers we have only fragments in the shape of some exquisite little models.
Pope Clement VII makes Fattucci write to Michelangelo that he wishes to erect a colossal statue on the piazza of S. Lorenzo, opposite the Stufa Palace. The giant is to surmount the roof of the Medicean Palace, with its face turned in that direction and its back to the house of Luigi della Stufa. Being so huge, it would have to be composed of separate pieces fitted together. Michelangelo speedily knocked this absurd plan on the head in a letter.
Symonds, John Addington: "The Life of Michelangelo Buonarroti", Modern Library (New York), p.256