Stern worked the better part of a week with such tools as he could find or make--he had to forge a wrench for the largest nuts--“taking down” the dynamo, oiling, filing, polishing and repairing it, part by part.

The commutator was in bad shape and the brushes terribly corroded. But he tinkered and patched, hammered and heated and filed away, and at last putting the machine together again with terrible exertion, decided that it would run.

“Steam now!” was his next watchword, when he had wired the dynamo to connect with the station on the roof. And this was on the eighth day since he had begun his labor.

An examination of the boiler-room, which he reached by moving a ton of fallen stone-work from the doorway into the dynamo-room, encouraged him still further. As he penetrated into this place, feeble-shining lamp held on high, eyes eager to behold the prospect, he knew that success was not far away.

Down in these depths, almost as in the interior of the great Pyramid of Gizeh--though the place smelled dank and close and stifling--time seemed to have lost much of its destructive power. He chose one boiler that looked sound, and began looking for coal.

Of this he found a plentiful supply, well-preserved, in the bunkers. All one afternoon he labored, wheeling it in a steel barrow and dumping it in front of the furnace.

Where the smoke-stack led to and what condition it was in he knew not. He could not tell where the gases of combustion would escape to; but this he decided to leave to chance.

He grimaced at sight of the rusted flues and the steam-pipes connecting with the dynamo-room-pipes now denuded of their asbestos packing and leaky at several joints.

A strange, gnome-like picture he presented as he poked and pried in those dim regions, by the dim rays of the lamp. Spiders, roaches and a great gray rat or two were his only companions--those, and hope.

“I don't know but I'm a fool to try and carry this thing out,” said he, dubiously surveying the pipe. “I'm liable to start something here that I can't stop. Water-glasses leaky, gauges plugged up, safety-valve rusted into its seat--the devil!”