If it were anybody else, they probably could've only vaguely guessed the range of suspects, but Benedict III clearly knew that Lucien only grasped the secrets about negative feelings and primeval devils but was unaware of the ways to steal and utilize the power of faith, and that Lucien was developing the Church of Steam in secret, intending to intercept the power of faith for Heit, the God of Craftsmen. Therefore, it was very likely that Lucien Evans and the North Church exchanged their bits of knowledge to make up for what they were short of.
Of course, with his smartness, Pope Viken knew better than to jump to any conclusion. The possibility could not be ruled out that somebody was doing it on purpose to mess up the situation.
"If it's really you, your acting skill will be better than all the professional actors…" The anger on Benedict III's face was gone, but he was still gnashing his teeth.