By this time they were thoroughly familiar with the camp, and decided to make an excursion into the woods the following day, taking lunch with them and making it a day’s outing. The cook so far departed from his usual iron-clad rules as to make them up a fine lunch, making due allowance for Jimmy’s proven capacity.

They started out immediately after breakfast. Not being particular as to direction, they followed the first old logging road that they came to. It led them deeper and deeper into the forest that was alive with the sounds and scents of spring. Last year’s fallen leaves made a springy carpet underfoot, while robins sang their spring song in the budding branches overhead.

For some time the boys tramped in silence, breathing deeply of the exhilarating pine and balsam atmosphere and at peace with all the world. Soon there was a glint of water through the trees, and the boys, with one accord, diverged from the faint trail that they had been following and were a few minutes later standing at the water’s edge.

They found themselves on the shore of a large lake. It was ringed about with big trees, many of which leaned far out over it as though to gaze at their reflections in the water. The ripples lapped gently on a sloping sandy beach, and the invitation to swim proved irresistible to all but Jimmy.

“I know what lake water is like at this time of year,” he said. “You fellows can go in and freeze yourselves all you like, but I’ll stay right here and look after the things. Just dive right in and enjoy yourselves.”

“Well, we won’t coax you,” said Bob. “But that water looks too good to miss. It is pretty cold, but I guess that won’t kill us.”

Off came their clothes, and with shouts and laughter they splashed through the shallow water and struck out manfully. The icy water made them gasp at first, but soon the reaction came, and they thoroughly enjoyed their swim. They tried to coax Jimmy in, but he lay flat on his back under a tree and was adamant to all their pleadings.

The others did not stay in very long, but emerged glowing from the effects of exercise and the cold water. As they were getting into their clothes they heard voices coming toward them, and they had hardly finished dressing when the voices’ owners came crashing through the underbrush close to where the boys were standing.

The two groups stared in astonishment for a few moments, for the newcomers were none other than Carl Lutz, Buck Looker, Terry Mooney, and another older fellow, who was a stranger to the radio boys.

Buck’s expression of surprise quickly gave place to an ugly sneer, and he turned to his friends.