person, an American, and presumably that American is John Barker!
The detective slips his hand around to his hip pocket, and as his fingers close over the butt of a 38-caliber pistol his pulse resumes its calm and even beat and he proceeds to make a mental inventory of the prospective assassins.
"Absolutely the most villainous-looking brace of cut-*throats I ever saw," he sums up. "But why should they plot to lay me out? Do they take me for a New York millionaire in disguise, and think I carry a million or two around in my pocket? Ah, so you were not the distinguished individual picked out by the precious pair, Barker. It's some other American. But who? And how can I manage to warn him of his danger?"
Barker rapidly revolves the situation, while covertly watching the Cubans. He suddenly starts, as from words uttered by one of them, as they arise to leave the cafe, he becomes aware that the cold-blooded crime planned within his hearing is to be carried out within the next hour or so.
"There's nothing for me to do but to shadow the pair," he mutters, as he steps again into the now moonlit street.
It is a simple matter for the experienced detective to keep the Cubans in sight, especially as they never once take pains to glance backward. They have traversed several streets, when the detective observes that they have halted and are apparently loitering near a larger and rather more elaborate cafe than the majority.
"So the American is in that cafe," reflects Barker; "now, which is the better plan, to go in and endeavor to pick out my fellow-countryman and warn him, or keep in the rear of these chaps and swoop down on them at the proper moment? The latter I guess is the safer. We'll see what we will see."
The wait is not a long one. Evidently the Cubans are familiar with the habits of the person they are seeking, for within fifteen minutes a rather tall young man emerges from the cafe, stopping a moment to light a cigar, and then starts down the shadowy street. Barker, after the first glance, pays little heed to the newcomer,
