That Betty's advice was needed was made manifest a moment later, for
the large steamer whistled sharply, which was an intimation to the
smaller craft to veer off, and Grace shifted the wheel.

They reached Dunkirk without further incident, except that about a
mile from it the motor developed some trouble. In vain Betty and the
others poked about in the forward compartment trying to locate it, and
they might not have succeeded had not a man, passing in a little
one-cylindered boat, kindly stopped and discovered that one of the
spark plug wires was loose. It was soon adjusted and the Gem
proceeded.

"I'll always be on the lookout for that first, when there is any
trouble after this," said Betty, as she thanked the stranger.

"Oh, that isn't the only kind of trouble that can develop in a motor,"
he assured her. But Betty well knew this herself.

They had passed Elm Island soon after leaving Mr. Lagg's store, but
saw no sign of life on it. They intended to come back later on in
their cruise and camp there, if they decided to carry out their
original plans of living in a tent or bungalow.

"That is, if the ghost doesn't make it too unpleasant," remarked
Betty.

They ate supper aboard the boat, cooking on the little galley stove.
Then the work of getting ready for the night, washing the dishes,
preparing the bunks, and so on, was divided among the five, though