Abstract: Based on the corpus of manuscripts subjected to censorship and bearing the initials of the censors, we propose to examine those that are active, that academicians took into the system of prior censorship, and the ambiguities of this half-public, half-secret activity. The work of bringing the texts, that were examined and finally approved, into line with standards, both in terms of language and ideas, outlines the shape of a shared authorship, which is precisely what clandestine manuscripts rejected.