"Not at all."
"An officer of the law, I suppose."
"I am—in a way."
"Working on this Langmore affair?"
"Yes."
"Have you been following me?"
"I've done more than that—I've been watching you."
"What! How long?"
"Quite a long while. I saw you in the library, twice, and down to the brook."
The man started and was evidently much put out. Then he forced a smile to his face.