According to Kinbote (in VN’s novel Pale Fire, 1962, Shade’s mad commentator who imagines that he is Charles the Beloved, the last self-exiled king of Zembla), in a conversation with him and Shade Mrs. Hurley mentioned the old man at the Exton railway station who thought he was God and began redirecting the trains:
Above this the poet wrote and struck out:
The madman’s fate