Presently a strange column appeared, composed of some fifteen or twenty disarmed men marching between a double rank of heavily equipped hoplites. As they drew near, they clasped imploring hands and evidently begged for mercy from the stern, tight jawed figure at Nelson's side. Contemptuous and unhearing the prisoners' piteous pleadings and lamentations, Hero Giles scowled upon them and deliberately turned his back.

"What are they?" inquired Nelson, vaguely alarmed. "Enemies?"

"Yes." There was a certain bitter savagery in the speaker's voice.

"These are the dauntless defenders of Atlans who ran at the report of thy weapon. Presently they die."

It was useless to interfere. The horrified aviator knew it and watched with compa.s.sionate eyes while the condemned soldiers were ranged in a single, white faced line. They remained silent now, seeming to have found courage now that hope was dead.

Upon brief command from a subaltern, the guards wheeled about and retreated perhaps twenty yards down the pa.s.sage. There they halted, glittering eyes peering through the slots in their helmets to fix themselves upon the rigid prisoners who stood numbly resigned to death.

With surprising speed each member of that weird firing squad detached a brazen grenade from his belt, then threw back his arm in exactly the same att.i.tude as a bomb-throwing doughboy. Then there came a short, sharp command and some fifteen or twenty grenades bobbed through the air to crash on the stones at the feet of the victims.

His head swimming with repulsion at the slaughter, Nelson beheld a curious sight. It seemed that from the broken grenades appeared a yellowish green vapor which sprung _of its own accord_ upon the silent upright rank! In an instant it settled like falling snow upon the doomed soldiers. For a breathless fraction of a second they stood, eyes wide with horror, then collapsed, kicking and struggling as men do under the influence of gas.

"Horrible!" gasped Nelson. "What was in the bombs?"

"A vapor," explained Hero Giles shortly. "A fungus vapor which, falling upon exposed flesh, instantly invades the blood and multiplies by millions. See--" He pointed to the nearest dead man and Nelson, with starting eyes, watched a yellowish growth commencing to sprout from the dead man's nostrils. Swiftly the poisonous mould threw out tiny branches, spreading with astounding rapidity over the skin until, in less than a minute after the grenades had exploded, the whole tumbled heap of dead were covered with a horrible yellow green fungus growth.

"Thou seest?" Hero Giles demanded. "Powerful, is it not? It is against the fungus vapor we wear this body armor made from the skin of a small lizard which inhabits our mountains."

Shocked and appalled, Nelson watched the retreat of the solemn, silent execution party.

Other soldiers fell to unconcernedly stripping their fallen comrades of equipment; then, to Nelson's horrified surprise, two hideous allosauri reappeared, shepherded by some six or eight keepers. Once the horrible creatures were released, they pounced upon the dead and, snarling horribly, commenced to rend and devour the corpses.

Too shaken to comment or to make the protest he knew to be futile, Nelson followed the stalwart English-speaking officer into a bronze door set in the cavern wall and up a short flight of stairs into what appeared to be a guard room, where food and wine were immediately set before the famished aviator.

"Yea," Hero Giles was saying as he set down a beautiful goblet and wiped the last traces of wine from his beard, "we will soon o'ertake thy friend. He was but little hurt, and thou wilt a.s.suredly join him in judgment before our great Emperor, Altorius XXII, at Heliopolis, our capital."

"Heliopolis?" mumbled Nelson, his mouth full of delicious stew that seemed to be made of veal. "Heliopolis? How far away is it?"

"A hundred leagues more or less," the other smiled. "Almost a third of the distance up this great valley."

"One hundred leagues! Three hundred miles! Then we won't be there for several days."

The Hero's deep, rather ominous laughter rang out in the little rock hewn chamber. "Days?" he jeered. "Days? Art thou mad? In two hours from the time we board the tube-road thou shalt learn thy fate from his Serene Highness."

"What!" Nelson's sunken and blood-shot gray eyes widened, while his jaw dropped incredulously. "One hundred leagues in two hours? As I remember there are about three miles to a league, so a hundred leagues in two hours means one hundred and fifty miles an hour! Why, that's utterly impossible! The Twentieth Century Limited doesn't go half so fast."

Several enormous emeralds set into the other's bronze cuira.s.se glittered softly and the Hero's cold blue eyes hardened as his hand sought the grenade belt.

"Impossible? Dost doubt my words, sirrah?" With an effort he controlled himself. "Nay, thou shalt see for thyself ere long. The tube-road runs from Heracles to Heliopolis. Thou canst trace its course on this map here on the wall."

"The dog-born devils of Jarmuth have no such means of travel,"

continued the Atlantean, with a touch of smug pride that reminded Nelson of a small town Middle Westerner speaking of the "rightest, tightest little town west of the Mississippi."

Nelson found it extremely weird to be sitting there in a heavy arm chair, drinking good red wine with a fierce armor-clad warrior who wore sandals, sword and a war cloak such as might have graced the limbs of Alexander of Macedon. But with the food and rich warm wine, he felt blood, strength and self-confidence pouring back into his weary body. "Jarmuth?" he inquired. "What is Jarmuth?"

At his question the domineering, predatory face across the table darkened and the scar on his cheek flamed red as a scowl of hatred gripped Hero Giles' visage.

"Jarmuth!" snarled the Hero, and his great hand closed like a vise.

"Jarmuth! A nation of treacherous, gold-adoring cannibals, whose countless hordes, sp.a.w.ned in the hot lowlands, ever threaten our frontiers. I tell thee, Friend Nelson, the dog-sired Jereboam will not rest until mighty Heliopolis lies in a heap of smoking ashes."

"Evidently," thought Nelson, taken aback at the other's vehemence, "this lad's English only in speech. I guess he's all Atlantean outside of that."

Warming to a fiercer pitch, the other fixed his guest with a smoldering gaze. "Jarmuth lies beyond Apida.n.u.s, the boiling river, and is the home of a savage horde whose horrid rites in Jezreel, the capital, stink as an offense to Saturn and the High G.o.ds! Why, mark you," the warrior prince continued, interrupting his tirade to gulp a goblet of wine, "five years ago, by treachery, they seized the beauteous Altara, sister of our gracious Emperor, and upon the annual feast of Beelzebub, that vile demon they worship, the dark dogs would have sacrificed and devoured her, according to their rites, had not our Emperor dispatched a ransom of six fair maidens to take her place.

"Every year since then Jereboam has exacted that same tribute. Every year their princes and priests gorge themselves on the tender white flesh of our fairest and n.o.blest maidens. But this tribute must end!

The augurs have told us so. Help will come from the Ice World." Hero Giles brought crashing down on the table a brawny fist, on whose wrist was fixed a bright, gem-studded bracelet.

Horror-stricken, Nelson nodded.

"It is for this alone," continued the Hero somberly, "that thy life and that of thy friend have been spared."

"So? I didn't notice," broke in Nelson, "that you particularly went out of your way to preserve my health a while back."

The heavy golden head shook slowly and a grim smile played about those thin cruel lips. "Nay, but I could have had thee slain. Come, as we go to the tube-road I'll show thee how much thou liest in the hollow of this, my hand." He thrust out a broad, powerful palm. "Forget not, fair sir. At any moment I or my Imperial Master may choose to close that hand."

"Perhaps!" stated Nelson, feeling it imperative to keep up his pose of independence. "But it might just happen that your hand would close on a porcupine, and so far from hurting the porcupine it would be your hand that would be hurt."

"Sirrah!" The Atlantean sprang to his feet and one hand shot to the grip of his ponderous, bronze sword; but even more quickly Nelson s.n.a.t.c.hed up his rifle, a thin smile playing on his lips.

"Drop it," he snapped. "Control yourself, or I'll plug you like that allosaur. Be reasonable, can't you? We both want something, and perhaps can help each other gain it."

The taut, menacing figure in armor relaxed and, with a gentle clank of accoutrement, Hero Giles resumed his seat.

"Prithee pardon me," he apologized ungraciously. "I was ever a hot-head and there is much in what thou sayest. We wish to force an end to this annual tribute--if not to regain our beloved Altara. And thou"--his heavy, golden eyebrows shot up--"and thou, what dost thou wish?"

Nelson lowered the menacing barrel. "I want the return of Richard Alden, free pa.s.sage back to that spot where he was captured and plenty of food and help should we need it. If I aid you in one, you must promise me in the other."

"Aye," returned the other doubtfully. "But I myself can pledge naught save thy immediate safety. 'Tis for our Imperial Majesty to say whether both thou and thy friend shall live, or whether ye shall feed our war dogs. Come now, we must go to Heliopolis."

[Ill.u.s.tration: _Map of Jarmuth and Atlans_]

Picking up his heavy, bronze helmet the Atlantean prince set it on his yellow head and waited impatiently for Nelson to drain the last of his wine. Then, with a swirl of his green cloak, he vanished through the rock wall, closely followed by a singularly distracted and alarmed aviator.

CHAPTER III

A bright yellow glare steadily increased to mark the end of the tunnel down which the two had progressed; then, with the sharp abruptness of a hand-clap, there resounded a loud challenge in that unintelligible Atlantean language, above which the hiss of steam could be loudly heard.