Mr. Ryder was first on the scene. He came running across from his cottage, a revolver in one hand and an electric flash lamp in the other. The Mexican linemen came tumbling out of their cottages a few moments later and immediately after two Mexican regulars arrived, all out of breath.

“Well, I think we’ve captured our man,” said Jack, panting in his excitement. “Here, lay hold of this fellow, so I can stand up.”

The soldiers seized the prostrated one but they still kept him pinned flat on his stomach, in spite of his protests.

“Mr. Ryder,” said Jack, “I think this is the man with the scarred foot. Turn your light this way until we have a good look at his feet. He hasn’t any boots on, that’s certain, for he moved about like a cat.”

Hurriedly the engineer turned the light on the native’s naked feet and there, standing out plainly in spite of the dirt and dust, was a long scar that extended across the heel and partly up the side of his foot toward the ankle. The wound looked exactly as if the man had at one time stepped on a very sharp stone that had laid the flesh open to the bone.

“By George, you’re right! He’s our man!” exclaimed the engineer jubilantly. Then to the soldiers in Spanish he said:

“Hustle him off to the guardhouse, men, and put a double watch over him, for he’s a traitor. I’ll pay a peso a day to the men who watch him, but I’ll have the scoundrel shot who lets him get away.”

Without any ceremony the regulars jerked the big man to his feet and marched him off down the street, Mr. Ryder and Jack following directly behind with their revolvers cocked and ready for action. But the heavy door to the prison pen had hardly been bolted behind the rurale when the town was aroused by another sensation. From down along the line of barbed wire fence came the sharp report of a rifle. The first report was followed by two others in quick succession.

“What is it! An attack!” gasped Jack as he rushed forward with Mr. Ryder. The sound of firing aroused every man in the camp and in an instant half-clad soldiers and workmen came tumbling from barracks hall and cottage.

“An attack! an attack!” was the cry they all uttered as they hurried into the trenches.