“Yes, but don’t say anything,” cautioned our hero. “She may be holding back for a kick-up. I never praise this motor, for I actually believe it knows what you say. Let well enough alone,” and the others laughed at his quaint conceit.

It was a beautiful day, and the trip along the lake was much enjoyed. It was rather lonesome, but the boys did not mind that.

As they moved along the shore of a little cove Jack suddenly called:

“Hold on! I think I heard something moving near the bank there,” and he pointed just ahead.

“Slow down the engine,” called Tom to Dick, and the latter throttled down, making the machinery almost noiseless. Then they all heard a crashing in the underbrush.

“Maybe it’s the hermit,” suggested Bert.

“Very likely,” agreed Jack. “I hope he doesn’t begin on one of his tantrums again.”

The sounds in the bushes grew, and a moment later three figures suddenly stepped into view on the sandy beach of the lake.

“Look!” exclaimed Tom in a low voice. “If this isn’t the limit!”

All four boys gazed toward the figures, to behold their old acquaintances, Professor Skeel, Sam Heller and Nick Johnson!