"Let us walk in this direction," said Tom. "I think this is right, and,
anyway, we may soon come to an air-hole, which will save us the trouble
of cutting an opening."
As they advanced they had kept a sharp lookout for the Baxter crowd, but
so far none of their enemies had put in an appearance.
"Hurrah!" suddenly shouted Tom. "Here's a signal of some sort!"
He pointed ahead, to where Dick and John Barrow had planted their first
signal pole. Both made a rush forward, and soon had the cooked meat
which had been tied in a cloth and the note pinned on the outside.
"A letter from Dick," said Tom, and read it aloud. "We are on the right
track, Sam, and if we only continue to steer clear of Dan Baxter and his
gang we'll be safe."
"Dick asks us to fire two shots, a minute apart, as a signal," came from
Sam. "I'll do it at once." And without delay he discharged the shotgun,
waited sixty seconds, and then discharged it again.
Both listened intently, and from a great distance came back two other
shots, also a minute apart.
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