The return through the woods was made in a very short time, the boys walking on at full speed until they were near the hut, when the utmost caution was used. By making quite a detour through the woods, Bob was able to get a full view of the watchful detectives, all of whom were seated on the grass in front of the hut, gazing at it so intently that there was no question that any suspicion had been aroused in their minds. Before they had left the hut Bob had placed the glycerine near the window, so that it could be reached from the outside, and, after it was learned that the enemy were still in blissful ignorance, but little time was lost in getting ready to return to Mr. Hoxie's well. Perhaps the boys were no more careless in carrying the glycerine this second time than they were the first, but they certainly walked faster, and when they arrived at their destination, they had been away such a short time that Ralph could hardly believe they had been to the hut in the woods and back. Everything was now in readiness for the important work, and the question that troubled the young moonlighters was whether the worthy Mr. Newcombe and his assistants would remain looking at the empty hut until the charge was exploded. CHAPTER VI TORPEDOING AN OIL-WELL. It is safe to say that Ralph, who was interested in the shooting of the well only as a spectator, was the most nervous one of all that party who were about to show Mr. Hoxie whether he had "struck oil" or not. Bob set about the work with the air of one perfectly familiar with what he was doing, and the others aided him whenever it was possible, George alone remaining inactive, since he considered himself entitled to a seat with the spectator. The well had, of course, been bored down as far as the bed-rock, leaving an opening from eight to ten inches in diameter and quite twelve hundred feet deep, which was nearly filled with the water that had flowed in and the oil that had been poured in to give some slight resistance at the top of the cartridge. Over this, grim and weird-looking in the moonlight, rose the framework of the derrick, formed of heavy timbers, and apparently solid enough to resist any pressure that might be brought to bear upon it. Near by were scattered pieces of machinery, tools and such debris as would naturally accumulate around a place of the kind. A large reel, wound with heavy cord, capable of sustaining a hundred pounds' weight, and with a shallow hook, which would easily become detached when the pressure was removed, was fastened at one of the uprights of the derrick, while directly over the well was a block for the cord to pass through. This was to be used to lower the cartridges into the well.