5860. These were preserved, to the end that, through them, all in the Christian world also who were able to render themselves invisible might be discovered; for, through such ones, they are found out. For there were, in the Christian world, among the Reformed, some who ascended by avenues known only to themselves, into societies where the good Reformed were; and there, as soon as they saw any, they hid themselves, by [making themselves] invisible, so that those who were in the society did not know that they were there. Since these had communication with those Babylonish wretches, they were all discovered, and cast down out of the societies from every direction: they belonged to many societies which looked westward. That art of theirs, by which they rendered themselves invisible, was found out: it was a unique art, which could not be learned, save by some who had contrived various schemes in the world: others were not able to render themselves such.