"Then how did Bill or any of his gang manage to creep up here and pin this to my door?"
"That I can't say, sir."
"I think I'll look after things to-night," said Frank grimly. "If we're getting careless around here Bill may walk in some night and seize the mine before we know a thing of what's going to happen."
He jerked the knife from the door, took the paper and placed it in his pocket, after which he indicated that he was ready to speak with the foreman, who had some matter of business to discuss.
When Tracy departed Frank sat down and meditated, for he had noticed something peculiar and remarkable.
There were ink-stains upon the thumb and two of the fingers of Jim Tracy's right hand.