Had it not been for the enthusiasm of a few collectors of that age, who shrank from no effort or privation in their researches, we should certainly possess only a small part of the literature, especially that of the Greeks, which is now in our hands. Pope Nicholas V, when only a simple monk, ran deeply into debt through buying manuscripts or having them copied. Even then he made no secret of his passion for the two great interests of the Renaissance, books and buildings. As Pope he kept his word. Copyists wrote and spies searched for him through half the world. Perotto received 500 ducats for the Latin translation of Polybius; Guarino, 1,000 gold florins for that of Strabo, and he would have been paid 500 more but for the death of the Pope. Filelfo was to have received 10,000 gold florins for a metrical translation of Homer, and was only prevented by the Pope's death from coming from Milan to Rome. Nicholas left a collection of 5,000 or, according to another way of calculating, of 6,000 volumes, for the use of the members of the Curia, which became the foundation of the library of the Vatican. It was to be preserved in the palace itself, as its noblest ornament, the library of Ptolemy Philadelphus at Alexandria. When the plague (1450) drove him and his court to Fabriano, whence then, as now, the best paper was procured, he took his translators and compilers with him, that he might run no risk of losing them.