We have, further, a good deal of information as to the way in which manuscripts and libraries were multiplied. The purchase of an ancient manuscript, which contained a rare, or the only complete, or the only existing text of an old writer, was naturally a lucky accident of which we need take no further account. Among the professional copyists those who understood Greek took the highest place, and it was they especially who bore the honorable name of 'scrittori.' Their number was always limited, and the pay they received very large. The rest, simply called 'copisti,' were partly mere clerks who made their living by such work, partly schoolmasters and needy men of learning, who desired an addition to their income. The copyists at Rome in the time of Nicholas V were mostly Germans or Frenchmen - 'barbarians' as the Italian humanists called them, probably men who were in search of favours at the papal court, and who kept themselves alive meanwhile by this means. When Cosimo de' Medici was in a hurry to form a library for his favorite foundation, the Badia below Fiesole, he sent for Vespasiano, and received from him the advice to give up all thoughts of purchasing books, since those which were worth getting could not be had easily, but rather to make use of the copyists; whereupon Cosimo bargained to pay him so much a day, and Vespasiano, with forty-five writers under him, delivered 200 volumes in twenty-two months. The catalogue of the works to be copied was sent to Cosimo by Nicholas V, who wrote it with his own hand. Ecclesiastical literature and the books needed for the choral services naturally held the chief place in the list.