According to this theory, it was Schoeffer who engraved the two founts of small type used in the two sets of Indulgences of 1454-5, and thus demonstrated that the new art could be applied to produce every kind of book and document which had previously circulated in manuscript. Fust gave him his daughter Christina in marriage, and Johann Schoeffer, the offspring of the alliance, distinctly tells us that this was in reward for his services. From the first, or almost the first, the firm adopted a policy of advertisement which other printers were slow to imitate, the partners giving their names in their earliest colophons and making no secret of the fact that they were using an "adinuentio artificiosa imprimendi ac caracterizandi" which enabled them to dispense with the pen. In 1460, in the _Catholicon_ of that year, the work of an anonymous printer to which we shall have to recur (see p. 51 _sqq._), the invention is distinctly claimed for Mainz, and from 1467 this claim was taken over by Peter Schoeffer, who in the colophons of his subsequent books again and again celebrated Mainz as the city singled out by divine favour to give the art to the world. The fact that for nearly forty years (1460-99) these statements remained unchallenged, and passed into the contemporary history of the time, is the strongest evidence in favour of the substantial invention of the art at Mainz that can be conceived. A single reference in 1499[22] to prefigurations of a humbler kind in _Donatuses_ printed in Holland and the presentation of a rival theory in 1568 cannot deprive of its due weight the evidence that during all the years when the facts were easily ascertainable judgment in favour of Mainz was allowed to go by default. But the Fust and Schoeffer colophons tell us more than this, for while they make no mention of Gutenberg they never claim the invention of printing as their own achievement. It is clear that Fust could not claim this himself, and while he was alive his son-in-law did not think fit to put forward, or allow to be put forward, any claim on his own behalf. It was only in 1468, when both Gutenberg and Fust were dead, that Schoeffer's "corrector," or reader, Magister Franciscus, was permitted to assert on his behalf, in the _Justinian_ of that year, that though two Johns had the better in the race he, like his namesake S. Peter, had entered first into the sepulchre, i.e. the inner mysteries of printing. The claim, thus irreverently put forward, is deprived of much of its weight by the moment at which it was made; nevertheless it can hardly have been baseless.