The boys who were left on the shore waved their hands frantically, shouting to the boys in the sinking boat not to jump, and pointing to the other boat that was coming to their assistance.

In the meantime, Bobby and his companions were bending to the oars lustily and putting all their strength into every stroke.

“Keep at it, fellows!” panted Bobby, while the perspiration rolled down his face. “Don’t stop to look behind. I’ll take a look once in a while just so as to keep the boat steering right. Pull with all your might!”

His comrades needed no urging, and the boat leaped through the water with a speed that rapidly cut down the space that still intervened between it and the sinking craft.

For sinking it was now beyond a doubt. The occupants had for the moment abandoned the design of springing overboard, and were baling frantically, using their caps and sweaters and hands in the effort to keep the doomed boat afloat until their rescuers could reach them.

“If they can only keep afloat two minutes more!” gasped Bobby, as a glance behind showed him the awful danger. “Don’t spare yourself, fellows. It may mean life or death. Just two minutes more and we’ll get them.”

But the two minutes grace could not be granted. They had got within perhaps a hundred feet, when there was a desperate cry from the inmates of the sinking boat, which was echoed from the watching crowd on the shore. The next instant the boat went down by the bow, and its four occupants were struggling in the lake.

“Pull, fellows, pull!” Bobby fairly screamed, bending almost double with his own exertions.

And while the other rescuers were following his example, it may be well for the benefit of those who have not read the earlier volumes of this series, to trace briefly his adventures and those of his friends up to the time this story opens.

Bobby Blake was a bright, wide-awake American boy, who had been brought up in the small but prosperous inland village of Clinton. He was the only son of parents who were in comfortable circumstances. Bobby was frank, merry and straightforward, and a great favorite with the boys of his own age, of whom he was the natural leader.