Note 1329 — Chapter IV · CENSORSHIP.

Archivo de Simancas, Inq., Lib. 32, fol. 666.

In the Indexes, books were divided into three classes. The first consisted of condemned authors, all of whose works were prohibited; the second of books by known authors, requiring expurgation; the third, of unknown authors, either prohibited or requiring expurgation.

This was the theory, but negligently observed in practice.