But the girl had impetuously followed him in.
The light went up, and Karl put a heavy shoulder against the door, closing it with a slam. The negro turned and stood with gaping mouth and staring eyes, dumb with terror. The girl recognised Karl with a little cry, and darted back toward the door. Immediately he caught her in his arms. Her lips opened, but their utterance was stifled by a handkerchief thrust between them with the dexterity of a practised hand.
Without one word of warning the Irishman stepped forward and struck the negro brutally in the face. The boy reeled, whimpering. Two more blows delivered with murderous ferocity silenced him altogether. He collapsed like a broken puppet, insensible on the floor, his face a curious ashen colour beneath its glossy skin of brown.
XX
RIPOSTE
The drizzle had grown thicker, the night blacker, the early morning air still more chill. But Lanyard was moving too swiftly to be affected by this last circumstance; the first he anathematised with the perfunctory bitterness of a skilled artisan who sees his work in a fair way to be obstructed by elemental depravity. Another of his trade would have termed such weather conditions ideal, and so might the Lone Wolf on an everyday job; but the prospect of a footing rendered insecure by rain trebled the hazards attending a plan of campaign that would brook neither revision nor delay.
There was only one way to break into the house on Seventy-ninth Street; this Lanyard had appreciated upon his first reconnaissance of the previous afternoon. He could have wished for more time in which to prepare and assemble tested equipment instead of relying upon chance to supply the requisite gear; but with all time at his disposal the mechanical difficulties of the problem would remain. Far from indifferent to these, Lanyard addressed himself to their conquest doggedly and with businesslike economy of motion.
Shunning the public paths he went over the park wall like a cat, sped across town through Eightieth Street, and so came to that plot of land upon which an apartment building was in process of erection, immediately to the north of the American headquarters of the Prussian spy system.
Walled in with stone two storeys deep, its gaunt skeleton of steel had been joined together as far as the seventh level. How much higher it was destined to rise was immaterial; for Lanyard's purpose it was enough that the frame had already outgrown its neighbour on the south.
A litter of lumber, huge steel girders, and other material narrowed the side street to half its normal width. The sidewalk space was trampled earth roofed with heavy planks for the protection of pedestrian heads, a passage lighted by electric bulbs widely spaced; midway in this an entrance to the structure was flanked by a wooden shanty, by day a tool house, after working hours a shelter for the night watchman. This boasted one glazed window dull with orange light.