"Then I'll get into those bushes," whispered Greg. "When you come back, come straight to the bushes, so I'll know that it's one of my own crowd. If any strangers appear, I'll listen to 'em if they halt near here, or trail them if they try to go past here." Dick nodded. This seemed about the best that could be done. Of course, back in camp, he had three more good and courageous fellows to draw upon as added forces, but with such strange doings afoot in the night it didn't seem wise to call the others away from the camp. Above all, the camp had to be watched and guarded. In half an hour Dick returned. He had found nothing to throw light on the puzzle of the night. Tom was back already, having beaten Dick to Greg's hiding place by about two minutes. "We may as well go back to camp," whispered Greg. "Not much!" Prescott retorted. "If anyone is trying to do anything to us, then we want to run the mystery down and put an end to it. My idea is that the best thing we can do is to get up to the road, post ourselves at fair intervals and watch to see if anyone should pass." "Correct!" clicked Reade. "And I think that would have been the best plan in the first instance." "If the powder-mill explosions are to keep up through the night," hinted Tom, "then there ought to be another one due within a few minutes. In that case our tormentors may be getting ready to plan something now. So let's hike for the road at once." Dick led the way, all three boys moving as noiselessly as they could. Prescott posted his friends, then chose his own post, so that they were stationed at intervals of about a hundred yards. All had hiding places within plain view of this rough country road. Now the time dragged again. Strain their ears as they might, none of these young outposts of Dick & Co. could hear a single suspicious sound. They must have remained there all of three quarters of an hour. Bang! sounded a terrific crash. Tom and Greg, without showing themselves in the road, hurriedly, silently reached their leader. "Pshaw!" uttered Prescott in disgust. "With all our care we were on the wrong side of camp to be near the explosion. Come along, now, but don't make any noise if you can help it, and don't step out into the road. We'll go straight toward that latest noise. If it takes all summer we're simply bound to find out who is trying to blow up these woods just to scare out a few little rabbits like ourselves!" CHAPTER XI IN A FEVER "TO FIND OUT" Our trio had nearly reached what they judged to be the scene of the latest explosion when Dick suddenly gave a low, sharp "hist," at the same time bending over to the ground while still peering ahead. Palpitating with excitement, Tom and Greg halted, also looking.