until he had removed those shameful ropes--his own rope! At that
thought he writhed again. But here an arroyo opening in the ragged wall
of a cliff caught his eye. He turned his horse into it and continued on
his way until he saw a projecting rock with a ragged edge, left where a
great fragment had recently fallen away.

Here he found it strangely awkward and even perilous to dismount
without his hands to balance his weight, as he shifted out of the
stirrups. In spite of his care, he stumbled over a loose rock as he
struck the ground and rolled flat on his back. He got up, grinding his
teeth. His hands were tied behind him. He turned his back on the broken
rock and sawed the ropes against it. To his dismay he felt the rock
edge crumble away. It was some chalky, friable stuff, and it gave at
the first friction.

Beads of moisture started out on the sheriff's forehead. Hastily he
started on down the arroyo and found another rock, with an edge not
nearly so favorable in appearance, but this time it was granite. He
leaned his back against it and rubbed with a short shoulder motion
until his arms ached, but it was a happy labor. He felt the rock edge
taking hold of the ropes, fraying the strands to weakness, and then
eating into them. It was very slow work!

The sun drifted up to noon, and still he was leaning against that rock,
working patiently, with his head near to bursting, and perspiration,
which he could not wipe away, running down to blind him. Finally, when
his brain was beginning to reel with the heat, and his shoulders ached
to numbness, the last strand parted. The sheriff dropped down to the
ground to rest.