ing cut black as ink, and showing
with wonderful distinctness.

The shadow was deep in the narrow ravine, and Frank sat with his back
to a wall of rock, looking upward, when he was startled to see a figure
rise in the bright moonlight.

On the brink of the ravine above stood a man who seemed to be peering
down at them.

"Awaken!" cried this man, in a loud voice. "You are in great danger!"

The cry aroused every sleeper, and Bushnell started up with his
Winchester clutched ready for use.

"What is it?" he asked.

Frank clutched his arm, gasping:

"Merciful goodness! look there--look at that man's face! Can the dead
return to life?"

He pointed at the man on the brink of the ravine above them. The light
of the moon fell fairly on the face of this man, which was plainly
revealed to every one of the startled and thunderstruck party.

"Move lively, down there!" cried the man, with a warning gesture.

"There have been spies upon you, and Pacheco knows where you have
stopped for the night."

Bushnell dropped his rifle, clutching at the neck of his shirt, and
gasping for breath.

"By ther livin' gods!" he shouted, "it's my pard, Jack Burk, or it's his
spook!"

"Id vas a sbook!" gurgled Hans Dunnerwust, quivering with fear. "Id vos
der sbook uf der man vot we seen deat as a toornail!"

In truth, the man on the brink of the ravine looked like Jack Burk, who
had been declared dead in the adobe hut near Mendoza.

"It is a resemblance--it must be a resemblance!" muttered Frank.

Once more the man above uttered a warning:

"You were trailed by a spy," he declared. "The spy saw you camp here,
and he has gone to bring Pacheco and the bandits. They will be here
soon. If you escape, you must move without further delay."

"It not only looks like my pard," said Bushnell, hoarsely, "but it has
ther voice of my pard! Ef Jack Burk is dead, thet shore is his spook!"

And then, as suddenly as he had appeared, the man above vanished from
view.

"Gone!" gasped Professor Scotch, wiping the cold perspiration from his
face. "I never took stock in ghosts before, but now----"

"Remember his warning," cut in Frank. "We had better heed it."

"Dot vos righd," nodded Hans.

"Yes, thet's right," agreed Bushnell. "We'll git out of hyar in a
howlin' hurry. Ef Jack Burk is dead, then thet wuz his spook come to
warn his old pard."

There was saddling and packing in hot haste, and the little party was
soon moving along the ravine