It was the latter fact that puzzled them, for they had somehow become convinced that the darkened craft that had led them past the breakwater last night was, if not the _Follow Me_, at least a boat of her size.

"And," said Harry Corwin, "we know that that boat did come in here, for we saw her light disappear behind the breakwater.

Let's look around again." "If she came in for gasoline," said Phil, "we might find out whether she got it.

There can't be many places where she could fill her tanks." The _Adventurer_ was slowly rounding a point that lay between the cove from which she had just emerged and Western Harbour, and Wink Wheeler, who was sitting on the rail on the starboard side of the deck, gave utterance to an exclamation of surprise and pointed ahead to where a drab-coloured power-boat had suddenly emerged into sight nearly a half-mile away.
"Look at that!" he cried.
"That's not the _Follow Me_, you idiot," said Joe.
"No, but where'd she come from ?" demanded Wink.
For a moment the boys stared and then Steve leaned quickly over the chart.

"By Jiminy!" he muttered.