"Wouldn't the small one at the back be safer?" Walthew suggested.

"That will be watched, but it might be of some help if you went that way. Possibly you would not mind wearing a sombrero and a Spanish cloak."

"Not at all," Grahame assured him. "Still, there are two of us."

"That is an advantage. If one leaves shortly after the other, those who keep watch and expect a single man will be puzzled."

Walthew chuckled.

"Good! I'd a hankering after adventures, and now it looks as if I'd be gratified. But you had better not give us clothes with a name on them."

"In this country, people out of favor with the Government are modest about their names," Don Martin rejoined.

Ten minutes later Grahame, wearing a wide black hat and a dark Spanish cloak, stepped quietly out into the shadowy street. He had seen that his automatic pistol was ready to his hand, having had more than one experience of the half-breed's dexterity with the silent knife. For all that, his hurried, stealthy gait was assumed and not natural to the man, whose heart beat calmly, though he cast quick glances about. The houses were high, and the street seemed to get narrower and darker as he went on. Then he imagined he heard soft steps behind him. Walking faster, he stopped at a corner and listened. Somebody was certainly following him.

Grahame's first impulse was to hide in a dark doorway and wait for his pursuer, but he reflected that this would not fall in with his host's plan, and he went on, keeping in the shadow while he made for the hotel at which he had 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.