It was, however, evident that he must either stop or pass through it, and in another moment Appleby saw him. There was nothing especially noticeable about him except that the broad felt hat was pulled down a trifle lower than seemed necessary, and Appleby wondered if his suspicions were causeless, until the man turned his head a trifle. The movement was almost imperceptible, but Appleby felt that the dark eyes had rested on him a moment. Then as the stranger passed on he saw one of the men in the wine-shop glance at his companion, who made a little gesture of comprehension. It was, however a few moments later, and there was once more silence in the shadowy street when he turned to Appleby.

“It is getting late, señor,” he said significantly. “You sleep at the ‘Four Nations’?”

“No,” said Appleby, who wondered if this was intended as a hint. “Still, I am going there.”

The peon, he fancied, glanced at the landlord. “Then it would perhaps be better to go round by the calle Obispo.”

Appleby reflected a moment, for he fancied there was a meaning in this, but he knew the calle Obispo would be almost deserted at that hour; while by going through the carniceria he would shorten the distance, and, at least, have the man he suspected in front of him.

“I think I will go straight on,” he said.

“Then you will find it convenient to walk in the middle of the road,” said the peon.

Appleby glanced sharply at the man. He had seen sufficient of Spanish towns to know that there were reasons quite unconnected with the safety of foot passengers or their property which warranted the warning; but the olive face was expressionless, and with a punctilious salutation he left the wine-shop. Glancing over his shoulder a moment or two later, he saw the men silhouetted black against the light as they stood in the doorway, and swung into faster stride. He felt he had nothing to fear from them, but their hints had been unpleasantly suggestive.

In two or three minutes he reached the dark slaughterhouses, which were faced by a wall with one or two unlighted windows high up in it, and as, treading softly, he strained his ears he once more caught a faint patter behind him. This was somewhat astonishing, as it was evident that if the man who passed the wine-shop still desired to keep him in view he must have made a considerable round. Appleby stopped suddenly, and made up his mind when the footsteps ceased too. The spot was lonely, and shut in by the slaughter-houses and high blank walls; while the feeling that somebody was creeping up behind him through the darkness was singularly unpleasant, so much so, in fact, that it changed the concern he was sensible of into anger. He had also distinct objections to being stabbed in the back, and decided that if an affray was inevitable he would, at least, force the assailant’s hand, and to do that cover of some kind was necessary. Sooner or later he would find a doorway he could slip into, and he went on again softly and hastily.

He had made another fifty yards, and the footsteps were plainer still behind, when a pillar partly bedded in it broke the bare line of wall, and pulling out the little pistol from his hip pocket he turned sharply and flung himself into the gloom behind it. Then he realized his blunder, and that he had two men to deal with instead of one, for a strip of heavy fabric was flung about his head, and hard fingers fastened on his throat. Appleby gasped, and drew the trigger convulsively, while there was a crash as the pistol exploded. Then he felt it slip from his fingers, for the strength seemed to go out of him, and he was only sensible that he was fighting hard for breath. How long the tense effort lasted he did not know, but his faculties had almost deserted him when a cry he could scarcely hear rose from the street, and was followed by a sound of running feet.