When Gutenberg left Strasburg for Mentz is not known, but he was in the latter city in 1448, as is testified by a deed relating to a loan which he had raised. His constant pecuniary difficulties resulted in his entering into partnership, in 1450, with the goldsmith Johann Fust, or Faust, a rich burgher of Mentz, who contributed large loans towards the working expenses, and was evidently to share in the profits of the press. Fust or Faust, the printer of Mentz, has sometimes been identified with the Faust of German legend. The dealings in the black art related of the one have also been ascribed to the other by various story-tellers, some of whom say that in Paris Faust the printer narrowly escaped being burnt as a wizard for selling books which looked like manuscripts, and yet were not manuscripts. The first printed letters, it should be observed, were exactly copied from the manuscript letters then in vogue. The first really definite recorded event in the history of Gutenberg's printing was a lawsuit brought against him by Fust, in 1455, when Gutenberg had to give an account of the receipts and expenditure relating to his work, and to hand over to Fust all his apparatus in discharge of his debt. The partnership was of course dissolved, Gutenberg left Mentz, and Fust continued the printing assisted by Peter Schoeffer. Schoeffer was a servant of Fust's, who had further associated himself with the establishment by marrying Fust's daughter, and to him some attribute the improvement of the methods then employed by devising matrices and punches for casting metal types. It has even been suggested that this device of his, communicated to Fust, induced the latter to rid himself of Gutenberg by demanding repayment of his advances when Gutenberg was unable to meet the call, and that having gained possession of his partner's apparatus, he was able, with the help of Schoeffer and his inventions, to carry on the work to his own profit and glory. But it is difficult to know whether to look upon Fust as a grasping and treacherous money-lender, or as a prudent and enterprising man of business. However this may be, at the time of the lawsuit the work of years was already perfected, printing with moveable types was now an accomplished thing, and the great Mazarin Bible, if not finished, was at any rate on the point of completion.