“A secret? What secret?”

“Let me ask you a question. That dog, you told me, was very fond of his master, Miles Mackenzie?”

“Yes.”

“Went with him nearly everywhere; followed him about?”

“That’s true.”

“Wasn’t it strange that the dog did not recognize his master’s corpse in the coffin when he looked at it night before last?”

“Why, I didn’t notice.”

“Then I did. An intelligent dog like Rover would have known even his master’s corpse.”

“Why, you don’t mean——”

“Wait. Perhaps you noticed that the dog was almost constantly searching for something.”