“How do you know that?”

“I followed you.”

“I saw no one.”

“That is what you may expect to see when I follow you. You spent a restless night at your cottage, and you formed certain plans, which in the early morning you proceeded to put into execution. Leaving your door just as day was breaking, you filled your pocket with some reddish gravel that was lying heaped beside your gate.”

Sterndale gave a violent start and looked at Holmes in amazement.