CHAPTER XXI
A CORDITE BOMB AND ITS WORK
In a moment the boys were hauling in the rope and Ned was back in
the cabin after a new bulb which he secured and attached in the
dark.
"Now give her a swing," he said as Bob again lowered the rope. "It
will make it harder to hit."
When Bob announced that all the rope was paid out Ned snapped the
switch again. In spite of the gravity of the situation all the boys
were tempted to laugh. A brilliant green glow shot down. An
emerald circle of light flooded the ground beneath.
"If anyone sees that they'll sure think it's a drug store,"
suggested Bob.
"'Or a sign of the Great Spirit, perhaps," added Ned soberly, "it
may help us in more ways than one, if Indians are--"
"Look," hoarsely shouted Alan, "there, over there!"
But his words were superfluous. The three boys saw the same thing.
And then as the wide swaying of the bulb swept the gnome-like
picture in green from view Ned threw himself over and shut off the
engine.
Not a hundred feet beneath the brilliant bulb the precipitous bank
of the river had again shot into the circle of light.
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