Bob found no difficulty whatever in handling the engine, and the ten mile trip passed without incident.

Professor Hopkins took occasion to talk to them about their proposed long journey.

"Remember," he said, "that each boy cannot invariably have his own way. In matters where differences of opinion arise, there should be no disputes, but the quietest and most thoughtful judgment exercised. You must meet each other half way, and be prepared to follow the guidance of your recognized leader."

These words were spoken as the boat was being headed in shore on the return trip, and the speaker almost immediately afterward declared that they must be extremely careful in regard to their dealings with strangers. "Treat all people pleasantly," he said; "avoid rough-looking characters, and say little about your plans to any one."

The boys listened attentively, in spite of the professor's solemn manner and the fact that they felt perfectly able to take care of themselves.

"Who is that standing on the wharf?" spoke up Sam, at length, as he shaded his eyes to get a clearer view. "Looks like Mr. Wingate."

"So it does," affirmed Tom Clifton, in surprise. "I don't believe I ever saw him down here before."

"Nat has evidently told him about the 'Rambler,' and he wants to find out if it is really true," suggested Dave. "Strange that he should have so much curiosity."

"Your boat is already becoming quite famous," observed Professor Hopkins. "Doubtless Mr. Wingate and his nephew would appreciate a little trip on board of her as much as I have."

"Very likely," answered Bob, with some hesitation; "and I think, if it is Mr. Wingate, that he has been favoring us with an inspection through a field-glass."

The object of their attention did not linger on the wharf. Before they could make sure of his identity, he began to walk rapidly away, and was almost immediately lost to view in the woods.

The thought of stepping ashore upon a wharf that was much too high for convenience caused Professor Hopkins quite a good deal of apprehension, and the excellent teacher did not breathe freely until he stood once more on solid ground.

"It's certain that you fellers ain't no sailors," exclaimed a hoarse voice close by, and Zeke 

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