These hours seemed to Stern the happiest of his life.

For the rapprochement between this beautiful woman and himself at such times became very close and fascinatingly intimate, and Stern felt, little by little, that the love which now was growing deep within his heart for her was not without its answer in her own.

But for the present the man restrained himself and spoke no overt word. For that, he understood, would immediately have put all things on a different basis--and there was urgent work still waiting to be done.

"There's no doubt in my mind," said he one day as they sat talking, "that you and I are absolutely the last human beings--civilized I mean--left alive anywhere in the world.

"If anybody else had been spared, whether in Chicago or San Francisco, in London, Paris or Hong-Kong, they'd have made some determined effort before now to get in touch with New York. This, the prime center of the financial and industrial world, would have been their first objective point."

"But suppose," asked she, "there _were_ others, just a few here or there, and they'd only recently waked up, like ourselves. Could they have succeeded in making themselves known to us so soon?"

He shook a dubious head.

"There may be some one else, somewhere," he answered slowly, "but there's n.o.body else in this part of the world, anyhow. n.o.body in this particular Eden but just you and me. To all intents and purposes I'm Adam. And you--well, you're Eve! But the tree? We haven't found that--yet."

She gave him a quick, startled glance, then let her head fall, so that he could not see her eyes. But up over her neck, her cheek and even to her temples, where the l.u.s.trous ma.s.ses of hair fell away, he saw a tide of color mount.

And for a little s.p.a.ce the man forgot to smoke. At her he gazed, a strange gleam in his eyes.

And no word pa.s.sed between them for a while. But their thoughts--?

CHAPTER XIII

THE GREAT EXPERIMENT

The idea that there might possibly be others of their kind in far-distant parts of the earth worked strongly on the mind of the girl. Next day she broached the subject again to her companion.

"Suppose," theorized she, "there might be a few score of others, maybe a few hundred, scattered here and there? They might awaken one by one, only to die, if less favorably situated than we happen to be. Perhaps thousands may have slept, like us, only to wake up to starvation!"

"There's no telling, of course," he answered seriously. "Undoubtedly that may be very possible. Some may have escaped the great death, on high alt.i.tudes--on the Eiffel Tower, for instance, or on certain mountains or lofty plateaus. The most we can do for the moment is just to guess at the probabilities. And--"

"But if there _are_ people elsewhere?" she interrupted eagerly, her eyes glowing with hope, "isn't there any way to get in touch with them? Why don't _we_ hunt? Suppose only one or two in each country should have survived; if we could get them all together again in a single colony--don't you see?"

"You mean the different languages and arts and all the rest might still be preserved? The colony might grow and flourish, and mankind again take possession of the earth and conquer it, in a few decades?

Yes, of course. But even though there shouldn't be anybody else, there's no cause for despair. Of that, however, we won't speak now."

"But why don't we try to find out about it?" she persisted. "If there were only the remotest chance--"

"By Jove, I _will_ try it!" exclaimed the engineer, fired with a new thought, a fresh ambition. "How? I don't know just yet, but I'll see.

There'll be a way, right enough, if I can only think it out!"

That afternoon he made his way down Broadway, past the copper-shop, to the remains of the telegraph office opposite the Flatiron.

Into it he penetrated with some difficulty. A mournful sight it was, this one-time busy ganglion of the nation's nerve-system. Benches and counters were quite gone, instruments corroded past recognition, everything in hideous disorder.

But in a rear room Stern found a large quant.i.ty of copper wire. The wooden drums on which it had been wound were gone; the insulation had vanished, but the coils of wire still remained.

"Fine!" said the explorer, gathering together several coils. "Now when I get this over to the Metropolitan, I think the first step toward success will have been taken."

By nightfall he had acc.u.mulated enough wire for his tentative experiments. Next day he and the girl explored the remains of the old wireless station on the roof of the building, overlooking Madison Avenue.

They reached the roof by climbing out of a window on the east side of the tower and descending a fifteen-foot ladder that Stern had built for the purpose out of rough branches.

"You see it's fairly intact as yet," remarked the engineer, gesturing at the bread expanse. "Only, falling stones have made holes here and there. See how they yawn down into the rooms below! Well, come on, follow me. I'll tap with the ax, and if the roof holds me you'll be safe."

Thus, after a little while, they found a secure path to the little station.

This diminutive building, fortunately constructed of concrete, still stood almost unharmed. Into it they penetrated through the crumbling door. The winds of heaven had centuries ago swept away all trace of the ashes of the operator.

But there still stood the apparatus, rusted and sagging and disordered, yet to Stern's practiced eye showing signs of promise. An hour's careful overhauling convinced the engineer that something might yet be accomplished.

And thus they set to work in earnest.

First, with the girl's help, he strung his copper-wire antennae from the tiled platform of the tower to the roof of the wireless station.

Rough work this was, but answering the purpose as well as though of the utmost finish.

He connected up the repaired apparatus with these antennae, and made sure all was well. Then he dropped the wires over the side of the building to connect with one of the dynamos in the sub-bas.e.m.e.nt.

All this took two and a half days of severe labor, in intervals of food-getting, cooking and household tasks. At last, when it was done--

"Now for some power!" exclaimed the engineer. And with his lamp he went down to inspect the dynamos again and to a.s.sure himself that his belief was correct, his faith that one or two of them could be put into running order.

Three of the machines gave little promise, for water had dripped in on them and they were rusted beyond any apparent rehabilitation. The fourth, standing nearest Twenty-Third Street, had by some freak of chance been protected by a canvas cover.

This cover was now only a ma.s.s of rotten rags, but it had at least safeguarded the machine for so long that no very serious deterioration had set in.

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.