This was made as simple as possible. Six new dry cells were to be taken to provide current. Then there were a spark-gap, a spark-coil, a key, and a detector, with the receiving set, switch, and aerial. To be sure, the entire aerial was not packed, but merely the wires and insulators, as spreaders could be made in the forest. Then there was an additional coil of wire to be used for lead-in and suspension wires. No tuning instrument was necessary, because the wireless outfits of all the members of the Camp Brady Wireless Patrol were exactly alike and so were already in tune with one another. Without a tuning instrument, to be sure, it might not be possible for Charley and Lew to talk with anybody except their fellows of the Wireless Patrol, but in the present circumstances that made no difference to them. They had no intention of talking to anybody else. The various instruments were carefully packed so that they could be carried without injury. The dishes were nested as well as possible. Then all were stowed away in the pack bags, together with the food supplies. The two blankets were tightly folded and tied, ready to be slung over the shoulders. Long before that last session of school, everything was in readiness. When finally that last session was over, the two lads had only to strap their packs on their backs, sling their blankets into place, and pick up their little fishing-rods, unjointed and compactly packed in cloth cases. Lew buckled the pistol to his belt and suspended the canteen from his shoulder, while Charley sheathed his little axe and hung it on his hip. Then, completely ready, the two lads waved farewell to their envious comrades and hastened away to the train. In less than an hour the train stopped to let them off at the little flag-station at the foot of Stone Mountain. In a moment more it had gone whistling around the shoulder of the hill, leaving the two boys alone on the edge of the wilderness. Quickly they adjusted their packs and started back along the railroad-track toward the gap through which they were to pass to Old Ironsides. Rapidly they made their way along the road-bed. "We'd better hustle while the going's good," commented Lew, glancing at the heavy clouds that obscured the sun, "for it will get dark early to-night. It'll be slow enough going once we leave the track." "There's one thing sure," replied Charley. "We won't be bothered with wet ground. I think I never saw the earth so dry at this season of the year. There was almost no snow last winter and we've hardly had a rain this spring. Usually it rains every day at this time of year."