“Was this quite in accordance with his ordinary habits?” Thorndyke asked.

“I should say not quite,” Blackmore answered. “My uncle was a studious, solitary man, but he was not formerly a recluse. He was not much of a correspondent but he kept up some sort of communication with his friends. He used, for instance, to write to me sometimes, and, when I came down from Cambridge for the vacations, he had me to stay with him at his rooms.”

“Is there anything known that accounts for the change in his habits?”