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.
Approaching with due precaution, Lanyard peered in. The light came from a single electric bulb and a potbellied sheet-iron stove, glowing red. Near by, in a chair tipped against the wall, sat the watchman, corncob pipe in hand, head drooping, eyes closed, mouth ajar. A snore of the first magnitude seemed to vibrate the very walls. On the floor beside the chair stood a two-quart tin pail full of arid emptiness.
Dismissing further consideration of the watchman as a factor, satisfied that the entire neighbourhood as well was sound asleep, Lanyard darted up the plank walk that led into the building, then paused to get his bearings.
Effluvia of mortar and damp lumber saluted him in an uncanny place whose darkness was slightly qualified by a
