Hilar paused, and his eyes dilated, kindling with a visionary fire.

“How glorious,” he went on, “to use for a purpose of cosmic renovation the deadly projectiles designed by our forefathers only to blast and destroy. Stored in sealed caverns, they have not been used since man abandoned the earth’s surface so many millenniums ago. Nor have the old space-ships been used either …. An interstellar drive was never perfected; and our voyagings were always limited to the other worlds of our own system—none of which was inhabited, or inhabitable. Since the sun’s cooling and darkening, there has been no object in visiting any of them. But the ships too were stored away. And the newest and speediest one, powered with anti-gravity magnets, has been made ready for our voyage to the sun.”

Rodis listened silently, with an awe that seemed to have subdued her misgivings, while Hilar continued to speak of the tremendous project upon which he, with six other chosen technicians, was about to embark. In the meanwhile, the black sun rose slowly into heavens thronged with the cold ironic blazing of innumerable stars, among which no planet shone. It blotted out the sting of the Scorpion, poised at that hour above the eastern hills. It was smaller but nearer than the igneous orb of history and legend. In its center, like a Cyclopean eye, there burned a single spot of dusky red fire, believed to mark the eruption of some immense volcano amid the measureless and cinder-blackened landscape.

To one standing in the ice-bound valley below the observatory, it would have seemed that the tower’s litten window was a yellow eye that stared back from the dead earth to that crimson eye of the dead sun.

“Soon,” said Hilar, “you will climb to this chamber—and see the morning that none has seen for a century of centuries. The thick ice will thaw from the peaks and valleys, running in streams to re-molten lakes and oceans. The liquified air will rise in clouds and vapors, touched with the spectrum-tinted splendor of the light. Again, across earth, will blow the winds of the four quarters; and grass and flowers will grow, and trees burgeon from tiny saplings. And man, the dweller in closed caves and abysses, will return to his proper heritage.”

“How wonderful it all sounds,” murmured Rodis. “But… you will come back to me?”

“I will come back to you… in the sunlight,” said Hilar.

II

The space-vessel Phosphor lay in a huge cavern beneath that region which had once been known as the Atlas Mountains. The cavern’s mile-thick roof had been partly blasted away by atomic disintegrators. A great circular shaft slanted upward to the surface, forming a mouth in the mountain-side through which the stars of the Zodiac were visible. The prow of the Phosphor pointed at the stars.

All was now ready for its launching. A score of dignitaries and savants, looking like strange ungainly monsters in suits and helmets worn against the spatial cold that had invaded the cavern, were present for the occasion. Hilar and his six companions had already gone aboard the Phosphor and had closed its air-locks.

Inscrutable and silent behind their metalloid helmets, the watchers waited. There was no ceremony, no speaking or waving of farewells; nothing to indicate that a world’s destiny impended on the mission of the vessel.

Like mouths of fire-belching dragons the stern-rockets flared, and the Phosphor, like a wingless bird, soared upward through the great shaft and vanished.

Hilar, gazing through a rear port, saw for a few moments the lamp-bright window of that tower in which he had stood so recently with Rodis. The window was a golden spark that swirled downward in abysses of devouring night—and was extinguished. Behind it, he knew, his beloved stood watching the Phosphor’s departure. It was a symbol, he mused… a symbol of life, of memory… of the suns themselves… of all things that flash briefly and fall into oblivion.

But such thoughts, he felt, should be dismissed. They were unworthy of one whom his fellows had appointed as a light-bringer, a Prometheus who should re-kindle the dead sun and re-lumine the dark world.

There were no days, only hours of eternal starlight, to measure the time in which they sped outward through the void. The rockets, used for initial propulsion, no longer flamed astern; and the vessel flew in darkness except for the gleaming Argus eyes of its ports, drawn now by the mighty gravitational drag of the blind sun.

Test-flights had been considered unnecessary for the Phosphor. All its machinery was in perfect condition; and the mechanics involved were simple and easily mastered. None of its crew had ever been in extraterrestrial space before; but all were well-trained in astronomy, mathematics, and the various techniques essential to a voyage between worlds. There were two navigators; one rocket-engineer; and two engineers who would operate the powerful generators, charged with a negative magnetism reverse to that of gravity, with which they hoped to approach, circumnavigate, and eventually depart in safety from an orb enormously heavier than the system’s ten planets merged into one. Hilar and his assistant, Han Joas, completed the personnel. Their sole task was the timing, landing, and distribution of the bombs.

All were descendants of a mixed race with Latin, Semitic, Hamitic, and negroid ancestry: a race that had dwelt, before the sun’s cooling, in countries south of the Mediterranean, where the former deserts had been rendered fertile by a vast irrigation-system of lakes and canals.

This mixture, after so many centuries of cavern life, had produced a characteristically slender, well-knit type, of short or medium stature and pale olive complexion. The features were often of negroid softness; the general physique marked by a delicacy verging upon decadence.

To an extent surprising, in view of the vast intermediate eras of historic and geographic change, this people had preserved many pre-atomic traditions and even something of the old classic Mediterranean cultures. Their language bore distinct traces of Latin, Greek, Spanish and Arabic.

Remnants of other peoples, those of sub-equatorial Asia and America, had survived the universal glaciation by burrowing underground. Radio communication had been maintained with these peoples till within fairly recent times, and had then ceased. It was believed that they had died out, or had retrograded into savagery, losing the civilization to which they had once attained.

Hour after hour, intervaled only by sleep and eating, the Phosphor sped onward through the black unvarying void. To Hilar, it seemed at times that they flew merely through a darker and vaster cavern whose remote walls were spangled by the stars as if by radiant orbs. He had thought to feel the overwhelming vertigo of unbottomed and undirectioned space. Instead, there was a weird sense of circumscription by the ambient night and emptiness, together with a sense of cyclic repetition, as if all that was happening had happened many times before and must recur often through endless future kalpas.

Had he and his companions gone forth in former cycles to the relighting of former perished suns? Would they go forth again, to rekindle suns that would flame and die in some posterior universe? Had there always been, would there always be, a Rodis who awaited his return?

Of these thoughts he spoke only to Han Joas, who shared something of his innate mysticism and his trend toward cosmic speculation. But mostly the two talked of the mysteries of the atom and its typhonic powers, and discussed the problems with which they would shortly be confronted.

The ship carried several hundred disruption-bombs, many of untried potency: the unused heritage of ancient wars that had left chasmal scars and lethal radio-active areas, some a thousand miles or more in extent, for the planetary glaciers to cover. There were bombs of iron, calcium, sodium, helium, hydrogen, sulphur, potassium, magnesium, copper, chromium, strontium, barium, zinc: elements that had all been anciently revealed in the solar spectrum. Even at the apex of their madness, the warring nations had wisely refrained from employing more than a few such bombs at any one time. Chain-reactions had sometimes been started; but, fortunately, had died out.