"I will make sure," he answered briefly, and bidding the collie guard the outside door, he then closed the door between the two rooms, and sat down near Lyle. "You remember," she began, "the evening you passed our house?" He nodded. "Well, among the strangers there that night, were an English expert, Mr. Lindlay, and a Mr. Van Dorn, who, they said, was an inventor of some mining machinery. A little while after you passed, I took a book and went out by the lake to read, sitting down behind a thick group of small evergreens. I read as long as I could see, and then sat for some time, thinking, and watching the reflection of the moon in the lake. Then the moon went behind that tall peak, you know, across the lake, and it was quite dark; but I remained there thinking so deeply that, although for a few minutes I heard low voices talking, I paid no attention to it, supposing it was simply some people going up the mountain, till suddenly I was aroused by Mr. Houston's voice, only a few feet from me, saying in a low tone, 'There may be considerable danger ahead of us, but you are just the one I need, and you will be well compensated,' and Mr. Van Dorn answered, 'Hang compensation! if I can help you get the best of these rascals, I'm going to do it, just for the gratification of the thing,' and then I heard the Englishman, with his peculiar accent, saying something I couldn't quite catch, but it seemed to be to the effect that he would help Mr. Houston against what he called the 'domned scoundrels.' "At first, I wanted to leave, but I couldn't without their seeing me, and having to make explanations, and making it embarrassing all round; and then the thought flashed through my mind that Mr. Houston was a good friend of mine, and perhaps if I stayed, I might be able to help him if he should be in any danger later, as he spoke of, so I remained there.