In the book Demons (by Dostoyevsky), there was a character, named Pyotr Stepanovich Verkhovensky, who claimed that he was connected to the international.
Did Dostoyevsky mention anywhere in the book that he really was?
Pyotr Stepanovic Verkhovensky was based on a Russian revolutionary during the time of Dostoevsky, Sergei Nechaev. Nechaev was masterful in creating fictitious networks of secret societies and claiming to have links to some greater organization (eg. the "international"). The reality was that he had no links, much like Pyotr equally doesn't have such links. The "international" is a made-up organisation that Pyotr used to manipulate others in the novel.