"Even supposing that there was a mystery," Harry said, "what good would it do to you to learn it, and what use would you make of your knowledge?"

"I do not know," the boy said carelessly. "But knowledge is power."

"You see," Harry said, "that supposing there were, as you say, a mystery, the secret would not be mine to tell, and even were it so before I told it, I should want to know whether you desired to know it for the sake of aiding your master, if possible, or of doing him an injury.

"I would do him no injury, assuredly," Jacob said. "Master Fleming is as good a master as there is in London. I want to find out, because it is my nature to find out. The mere fact that there is a mystery excites my curiosity, and compels me to do all in my power to get to the bottom of it. Methinks that if you have aught that you do not want known, it would be better to take Jacob Plummer into your confidence. Many a man's head has been lost before now because he did not know whom to trust."

"There is no question of losing heads in the matter," Harry said, smiling.