in 1595.[119] Afterwards I shall proceed to explain the operation of the system, and to illustrate by details the injury inflicted upon learning and enlightenment.
[Footnote 118: _Discorso Sopra l'Inq._ vol.iv.p.

54.] [Footnote 119: These rules form the Preface to modern editions of the Index.

The one I use is dated Naples, 1862.

They are also printed in vol.iv.of Sarpi's works.] The preambles to this document recite the circumstances under which the necessity for digesting an Index or Catalogue of Prohibited Books arose.
These were the diffusion of heretical opinions at the epoch of the Lutheran schism, and their propagation through the press.

The Council of Trent decreed that a list of writings 'heretical, or suspected of heretical pravity, or injurious to manners and piety,' should be drawn up.