Excerpt from Clairvoyance
Clairvoyance means literally nothing more than "clear-seeing" and it is a word which has been sorely misused, and even degraded so far as to be employed to describe the trickery of a mountebank in a variety show. Even in Это и многое другое вы найдете в книге Clairvoyance (Classic Reprint) (C. W. Leadbeater)