"What's up?" demanded Hazelton, dropping his voice to a whisper.

"You and I are."

"But what's the matter?"

"I couldn't sleep," Tom whispered.

"You--troubled with nerves!" gasped Hazelton.

"Not just the way you understand it," returned Tom. "But I was
thinking, thinking, and I sat by the window yonder. Come over
there, Harry, but step without noise."

Wondering what it all meant, Hazelton softly followed his chum
to the open window.

"Now, look," said Tom, pointing, "and tell me what you see."

"A moment ago I thought I saw a light twinkling over there among
the hills."

"Look sixty seconds longer, and you'll see more lights, Harry;
those lights are on the trail that leads from the nearest gold
mines to _El Sombrero_. It is the trail Don Luis pointed out
to us to-day."

"But what--"