nued 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.

Presently he drew out his jackknife and methodically cut the remaining
bonds. It came to him suddenly, as he stood up, that someone might have
seen this singular performance and carried the tale away for future
laughter. The thought drove the sheriff mad. He swung savagely into the
saddle and drove his horse at a dead run among the perilous going of
that gorge. When he reached the plain he paused, hesitant between a
bulldog desire to follow the trail single-handed into the mountains and
run down the pair, and a knowledge that he who retreats has an added
power that would make such a pursuit rash beyond words.

A phrase which he had coined for the gossips of Woodville, came back
into his mind. He was no longer as young as he once was, and even at
his prime he shrewdly doubted his ability to cope with Riley Sinclair.
With the weight of Gaspar thrown in, the thing became an impossibility.
Gaspar might be a weakling, but a man who was capable of murder was
always dangerous.

To have been thwarted once