The expedition's "psychic investigator", Thornton faints twice when confronted with the nightmarish relics below Exham Priory, and ends up committed to the Hanwell insane asylum with Delapore, though they are prevented from speaking to one another.
During an expedition to Exham Priory, Thornton, the "psychic investigator," experiences two fainting spells when confronted with the disturbing artifacts found there. He is then sent to the Hanwell insane asylum alongside Delapore, but their communication is restricted.