All books and tracts (pamphlets) are forbidden, whatever may be their titles, or their subject-matter, and in whatever language they may be written ... and whether they be original productions or translations, which have been written by heretics, or which may be printed by heretics ... even when such books contain no material bearing upon faith or religion.[122] Also all books which, within the preceding forty years have been issued without the name of the author, and the name and address of the printer, or for which have not been secured the approval and license of the bishop or inquisitor, or of some other official appointed for the purpose by the pope or by the inquisitors. Record of such permit must be printed in each copy of the book. Forbidden also are all books having to do with the subjects of aeromancy, cheiromancy, physiognomy, geomancy, hydromancy, oneiromancy, pyromancy, or necromancy, divination, magic, or astrology, (exceptions are made in favour of treatises on natural science planned for the guidance of mariners, agriculturists, or physicians); and all books which have been or shall be condemned under the decrees of popes or of councils. The prohibition of every work that had been produced, or that might thereafter be produced, from the presses of printers classed as heretics (of whom sixty-one were specified by name) constitutes a new feature in the system of Indexes, and is evidence of the importance that had come to be associated with the influence of the printer-publishers of the time. The list is alphabeted by forenames. It comprises: for Augsburg 1, Sig. Grym; for Basel 15, the most important being the brothers Petri, Oporinus, Cratander, and Wolfius; for Frankfort 1, Brubachius; for Genoa 5; for Marburg 2; for Hagenau 1; for Leipzig 2, Blum and Wohlrab; for Nuremburg 5, including Montanus; for Poschlav (Bohemia) 3; for Strasburg 9, including Ulricher and the brothers Richelius; for Tübingen 1, Morhadius; for Venice 1, Brucciolus; for Wittenburg 5, including Rau, Crato, and Klug; for Zurich 3, including Gesner; for Paris 1, but that one noteworthy, Robert Estienne, the most scholarly publisher of his generation; without specification of place, 5. The selection of firms gives an indication of the places which in this matter of heretical publishing were at that time considered to be the sources of danger for the doctrines and for the believers of the Church. The omission of any name from the Low Countries would indicate that the books from the Dutch and Flemish presses were not making their way into Italy and were not known to the members of the Roman Inquisition.