Two years later (29 August, 1459) Fust and Schoeffer produced another Psalter, in the same types and with the same capitals, with twenty-three instead of twenty lines to a page. This was stated in the colophon to have been printed "ad laudem dei ac honorem sancti Jacobi," and was thus apparently commissioned by the Benedictine monastery of S. James at Mainz. Its arrangement is that generally in use at the time in German monasteries. Thirteen copies of this edition are preserved, all on vellum, viz. four in England (British Museum, Bodleian, John Rylands Library, and the Earl of Leicester's library at Holkham), two at Paris, one at the Hague, five in Germany, and one in Mr. Morgan's collection at New York. This last was bought by Mr. Quaritch at the sale of the library of Sir John Thorold for L4950. Between the production of these two Psalters Fust and Schoeffer printed in the same types on twelve leaves of vellum the Canon of the Mass only, obviously that it might be bought by churches which owned Missals otherwise in good condition, but with these much-fingered leaves badly worn. The unique copy of this edition of the Canon was discovered at the Bodleian Library in a Mainz Missal of 1493 and identified by Mr. Gordon Duff. It is described by Mr. Duff in his _Early Printed Books_, and by Dr. Falk and Herr Wallau in Part III of the Publications of the Gutenberg Gesellschaft, with facsimiles of ten pages. In October, 1459, Fust and Schoeffer took an important step forward by printing in small type the _Rationale Diuinorum Officiorum_ of Gulielmus Duranti, a large work explaining the meaning of the various services of the Church and the ceremonies used in them. The text is printed in double columns with sixty-three lines in each column, and the type measures 91 mm. to twenty lines. A copy at Munich is printed partly on paper, partly on vellum. All the other forty-two copies described by Mr. De Ricci are entirely on vellum. The book has also one large and two smaller capitals printed in two colours, and the first of these has been reproduced as a frontispiece to this chapter, together with a piece of the neat small type which, by demonstrating the possibility of cheap printing, set up a real landmark. In 1460 Fust and Schoeffer gave another proof of their skill in their edition of the _Constitutions_ of Pope Clement V with the commentary of Joannes Andreae. The text of the Constitutions is printed in two columns in the centre of each page in a type measuring 118 mm. to twenty lines, with the commentary completely surrounding it in the 91 type used in the _Duranti_. Headings and colophon are printed in red, and the general effect is extremely rich and handsome. All the fourteen copies known to Mr. De Ricci are printed on vellum.