in
overheating a horse is that it may cool too quickly afterward.

He stooped directly in front of Satan and swept up an arm in command;
it brought only a flicker of the eyelid, the eyelid which drooped over a
glazing eye.

"Up!" he commanded.

One ear again pricked; the head lifted barely clear of the ground; the
forelegs stiffened with effort, trembled, and were still again.

"Bart!" shouted the master, "wake him up!"

The voice could not have carried to the wolf through the uproar of the
waters, but the gesture, the expression brought home the order, and
Black Bart came to his feet, staggering. Right against the nose of Satan
he bared his great teeth and his snarl rattled. No living creature could
hear that sound without starting, and the head of Satan raised high.
Still before him Bart growled and under his elbow and his chest the
hands of the master strained up. He swayed with a snort very like a
human groan, struggled, the forelegs secured their purchase, and he came
slowly to his feet. There he stood, braced and head low; a child might
have caught him by the mane and toppled him upon his side, and already
his hind legs were buckling.

"Get on!" cried Barry.

There was a lift of the head, a quivering of the tensed nostrils,
but that was all. He seemed to be dying on his feet, when the master
whistled. The sound cut through the rushing of the Asper as a ray
of light probes a dark room, shrill, harsh, like the hissing of some
incredible snake, and Satan went an uncertain step forward, reeled,
almost fell; but the shoulder of the master was at his side lifting up,
and the arm of the master was under his chest, raising. He tried another
step; he went on among the trees with his forelegs sprawling and his
head drooped as though he were trying to crop grass. Black Bart did his
part to recall that flagging spirit. Sometimes it was his snarl that
startled the black; sometimes he leaped, and his teeth clashed a hair's
breadth from Satan's nose.

By degrees the congealing blood flowed freely again through Satan's
body; he no longer staggered; and now he lifted a forepaw and struck
vaguely at Bart as the wolf-dog leaped. Barry stepped away.

"Bart!" he called, and the shouting of the Asper was now so far away
that he could be heard. "Come round here, old boy, and stop botherin'
him. He's goin' to pull through."

He leaned against a willow, his face suddenly old and white with
something more than exhaustion, and