The second and more interesting Basel printer, Michael Wenssler, seems to have taken Schoeffer as his model, and reprinted many of Schoeffer's editions, following the wording of his colophons and investing them with the same glories of red ink. Whereas, however, from about 1476 Schoeffer's activity was much less conspicuous, Wenssler for the next ten years poured out edition after edition of all the heaviest legal and theological works, until he must have overstocked the market. Then he devoted himself almost exclusively to liturgical printing, but his affairs became hopelessly involved, and in 1491 he fled from his creditors at Basel, and became a wandering printer, finding commissions at Cluny and Macon, and then settling for a time at Lyon. Many of the early printers in Italy made this mistake of flooding the market with a single class of book, but Wenssler is almost the only notable example in Germany of this lack of business instinct. Travelling along the Rhine from Mainz in the opposite direction we come to Cologne, and here Ulrich Zell, like Berthold Ruppel, a native of Hanau, but who calls himself in his books a "clerk of the diocese of Mainz," enrolled his name on the register of the University in June, 1464, doubtless for the sake of the business privileges which the Senate had it in its power to confer. The first dated book from his press, S. John Chrysostom, _Super psalmo quinquagesimo_ (Psalm li., according to our English reckoning), was issued in 1466, but before this appeared he had almost certainly produced an edition of the _De Officiis_ (see the frontispiece to this chapter, Plate VI), the most popular of Cicero's works in Germany, which Fust and Schoeffer had printed in 1465 and reprinted the next year. Avoiding the great folios on which the early printers of Mainz, Strassburg, and Basel staked their capital, Zell's main work was the multiplication of minor theological treatises likely to be of practical use to priests. Of these he issued countless editions in small quarto, along with a comparatively few small folios, in which, however, his skill as a printer is seen to better advantage. He continued in active work until 1494, gave, as we have seen (Chapter III.), his version of the origin of printing to the compiler of the Cologne Chronicle published in 1499, and was still alive as late as 1507.