It may be imagined that many of Lorenzo’s fellow-citizens were his rivals in book-collecting. A fine library had once been formed by Piero de’ Pazzi, son of Andrea. Francesco and Angelo Gaddi followed his example, and the great public library of their native city contains many books once in their possession. Poliziano’s friend, the accomplished merchant Filippo Sassetti the elder, also made a large collection. The good custom of making special bequests to secure these literary treasures from dispersion was kept up. Boccaccio had done this, and Riccoli, Traversari, Cardinal Piero Corsini and others; and in like manner Ugolini Guigni, Bishop of Volterra, left his books to the Benedictine abbey at Florence.[106] In 1477, Jacopo Salvini, Bishop of Cortona, bequeathed his collection to Lorenzo de’ Medici.[107] The latter had literary correspondents everywhere. In 1476 we find him corresponding with the Milanese Gio. Francesco della Torre, who, with Maestro Bonaccorso of Pisa, had purchased the books of Andronikos Kallistos, when the latter purposed returning from Lombardy to his own home.[108] Giovanni Rossi of Candia, who had been employed by Cardinal Bessarion, was also made use of by Lorenzo, apparently to look after copies of manuscripts.[109] Among those more closely connected with him in later years, Poliziano, Pico, and Ermolao Barbaro took charge of the enrichment of his collection and that of the convent libraries of San Marco, Fiesole, and San Gallo. Ho said once to Poliziano, he wished that he and Pico could procure him so many books that his income would not suffice to buy them, and he should be obliged to pawn his household goods. He kept copyists in many places, especially at Padua, which, as the residence of so many great scholars and from its connection with the Levant through Venice, was a spot favourable to book collectors.