"I guess that would be better," Bob agreed thoughtfully.

"Then suppose you and Jack turn detective and keep an eye on him. But you'll have to be mighty careful and not give yourselves away. There's one thing in your favor," he added after a moment's pause. "Los isn't what you'd call quick witted, that is, he didn't used to be, and I kind of wonder that Hains would pick him for a job of this kind."

"Perhaps he thought you wouldn't suspect him because you used to know him," Bob suggested.

"I reckon that's it and, frankly, I didn't, not till you told me what you saw last night."

Just then Charlie rang the bell for breakfast and, with a parting word to be careful, Jeb led the way into the house.

CHAPTER X.
ON WATCH.

Bob had not seen Jack before breakfast as he had gotten up some time before and had gone for a ride with Sue. But they returned before the meal was over and Bob came in for a good bit of joshing for being such a sleepy head.

"Your shift has been on duty two hours already," Sue told him.

"Then why isn't Jack on the job?" he retorted.