Froben’s list included a number of “orthodox” theological works, and remaining as he did in the fold of the Church, the influence of his Press was as a whole exercised consistently against the doctrines of the Reformers. His imprint appears never to have been associated with any of the doctrinal books or tractates of the Lutherans, Calvinists, or Zwinglians.[87] Not a few of Froben’s more costly publications were undertaken in coöperation with other publishers, a kind of partnership agreement being entered into for each particular book taken up in this manner. His more important associates were Johann Amerbach, who took high rank among the scholarly printers of the time, Johann Petri, also of Basel, and Franz Birckmann of Cologne. This method of dividing the risk of an undertaking between several publishing concerns became, later, a very general practice with the publishers of London. Erasmus, writing from Basel, in 1523, to Vergilius Polydorus, says: “I find here three methods of bringing a book into print. Sometimes Froben takes upon himself the entire risk and outlay.... In other cases the publication is undertaken for the account of some person interested, and Froben simply reserves a commission for his services; and under a third arrangement, the publication is undertaken by two or more firms, associated as a temporary company.... It is now being considered in Paris whether this book of yours [Erasmus does not mention the title of the book] is to be published by Birckmann alone, or by the ‘Company.’ As soon as Froben has returned from the Fair (at Frankfort) I will write to you what the decision has been. I hope that I shall be able to arrange the matter to your best advantage.” Whatever may have been the pressure of work in the Froben printing-office, either in connection with the completion of books for the Frankfort Fair, or for any other cause, there appears never to have been question of postponing the publications of any of the writings of Erasmus himself. For these the presses were always ready because for these there was always a waiting public. A year or two later Erasmus writes: “Froben is expending enormous sums for manuscripts and for collation and revision of these.” Among the revisers referred to in this statement was the famous scholar Beatus Rhenanus, who having studied philosophy in Paris and sojourned for a brief period in Strasburg, had migrated to Basel, and was devoting himself exclusively to the work of the Froben Press. He served not only as a reviser and press-corrector, but as a literary counsellor, to whose suggestions were due a number of Froben’s scholarly undertakings. Erasmus speaks with high regard of his learning and conscientiousness and of the value for Froben of his coöperation.