"Well now, you know all about it!"

When Zureda left the tavern, his first impulse was to go home and put it up to Rafaela. Either with soft words or with a stick he might get something about Berlanga out of her. But presently he changed his mind. Affairs of this kind can't be hurried much. It is better to go slow, to wait, to get information bit by bit and all by one's self. When he reached the station it was six o'clock. He met Pedro on the platform.

"Which engine have we got to-day?" asked Amadeo.

"Nigger," answered the fireman.

"The devil! It just had to be her, eh?"

That run was terrible indeed, packed full of inward struggles and of battles with the rebellious locomotive—an infernal run that Zureda remembered all his life.

With due regard for the prudent scheme that he had mapped out, the engineer set himself to observing the way his wife and Manolo had of talking to each other. After greatly straining his attention, he could find nothing in the cordial frankness of their relations that seemed to pass the limits of good friendship. From the time when Berlanga had stood godfather for little Manolo, Amadeo had begged them to use "thee" and "thou" to each other, and this they had done. But this familiarity seemed quite brother-and-sisterly; it seemed justified by the three years they had been living in the same house, and could hardly be suspected of hiding any guilty secret.

None the less, the jealousy of Zureda kept on growing, rooting itself in every pretext, and using even the most minor thing to inflame and color with vampire suspicion every thought of the engineer. The notion kept growing in Zureda; it became an obsession which made him see the dreaded vision constantly, just as through another obsession, Berlanga's desire for Rafaela had been born.

At last Amadeo became convinced that his skill as a spy was very poor. He lacked that astuteness, those powers of detection and that divining instinct which, in a kind of second sight, makes some men get swiftly and directly at the bottom of things. In view of his blunt character, unfitted for any kind of diplomatic craft, he thought it better to confront the matter face to face.

As soon as he had come by this resolution, his uneasiness grew calm. A sedative feeling of peace took possession of his heart. The engineer passed that day quietly reading, waiting for night to come. Rafaela was sewing in the dining-room, with little Manolo asleep on her lap. Half an hour before supper, Zureda tiptoed to their bedroom and took from the little night-table his heavy-bladed, horn-handled hunting knife—the knife he always carried on his runs. After that he put on a flat cap, tied a muffler round his neck—for the evening was cold—and started to leave the house. In the emptiness of the hallway his heavy, determined footfalls, echoing, seemed to waken something deadly.