"Yes," he said slowly; "I have heard. That was in part why I came here at first, because I knew that I should be alone. I had need of solitude in order to accomplish that which I had begun."
"Your magic?" queried Chris eagerly.
"Yes, little one, my magic. But"—he was smiling—"I have never remained here for the night. And the charm, you say, is not so potent during the day."
"You may be under it already," she said. "I wonder if you are."
"Ah!" Bertrand's tone was suddenly grave. "That also is possible."
"I wonder," she said again. "That may be what made you knock your head. One never knows. But tell me about your magic. What is it? What do you do?"
"I think," he said, "I calculate. And I build."
"What do you build?"
"It is a secret," he said.
"But you will tell me!"