Holmes chuckled and rubbed his hands. “This case certainly presents some features of its own,” said he. “How much time elapsed between your turning the corner and your discovery that the road was clear?”

“Two or three minutes.”

“Then he could not have retreated down the road, and you say that there are no side roads?”

“None.”

“Then he certainly took a footpath on one side or the other.”

“It could not have been on the side of the heath, or I should have seen him.”

“So, by the process of exclusion, we arrive at the fact that he made his way toward Charlington Hall, which, as I understand, is situated in its own grounds on one side of the road. Anything else?”