CHAPTER TWELVE.
A STORM OF STONES.
Fortunately for the fugitives, the cavity into which they had crept was a shaft of but slight diameter, otherwise they could not have gone down without dropping far enough to cause death, for the echoes from the pebbles betokened a vast vertical depth.
As it was, the void turned out to be somewhat like that of a stone-built chimney with here and there a point left projecting.

It was so narrow, moreover, that they were able to use both hands and knees in the descent, and by this means they accomplished it.
They went but slowly, and took care to proceed with caution.

They knew that a false step, the slipping of a foot or finger, or the breaking of a fragment that gave hold to their hands, would precipitate them to an unknown depth.
They did not go farther than was necessary for quick concealment.

There was noise made in their descent, and they knew that the Indians would soon be above, and might hear them.

Their only hope lay in their pursuers believing them to have gone by the left hand path to the plain above.