left his mules. There were, he imagined, two men following him now.

A few moments afterward he reached the end of the dark street, and the empty plaza lay before him. The moon shed a faint light upon the stones and the high, white walls, and Grahame was glad of this. Now, if it were needful, he could defend himself: the walk through the shadow had been trying. Still, he must not hurry, for he never promised more than he meant to perform, and he knew that Don Martin relied upon his playing out his part. Perhaps he overdid it when he stopped to light a cigarette, for, looking up as he dropped the match, he saw two dark figures stop at the corner he had left. Then there was a low whistle, and one of them disappeared. Grahame smiled, because he knew that Walthew had divided the attention of the spies. The remaining man, however, walked quickly after him, and when Grahame was half way across the plaza he waited. His pursuer seemed to hesitate, for he came on more slowly, and stopped a few yards off.

"The American!" he exclaimed.

"English," said Grahame calmly. "The difference is, no doubt, not important."

The man looked hard at him, and Grahame carelessly dropped his hand upon his pistol.

"I am going to the fonda; if you are going that way,[Pg 21] I would rather you walked in front. One is careful at night, my friend."

[Pg 21]

Though the fellow had a sinister look, he smiled and went off with an apology, and Grahame, going on to the hotel, waited outside until Walthew came up. The boy looked hot and breathless, but Grahame noticed that he had a flower in his hand.

"I've been followed," Walthew laughed. "The fellows dropped back soon after I came into the moonlight. Guess they saw they were after the wrong man."

"Very possibly. It happened to me. I wonder whether Castillo got away?"

They listened, but the town was quiet. One or two citizens crossed the plaza, but no sound that indicated anything unusual going on rose from the shadowy streets.

"It seems likely," Walthew replied. "I don't think they could have arrested him without some disturbance. Why didn't they search Sarmiento's house?"

"Perhaps they were afraid of starting a riot that would spread. The President seems to be a capable man, and Don Martin obviously enjoys the confidence of the citizens. On 

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