It was a wild, fierce attempt on their part to hold us even to the last from their great ray, and as their three or four hundred cylinders massed so suddenly before us and faced us, our own column was leaping upon them with all the impetus of our thousand and more space-fliers! The next moment cylinder and space-flier were reeling in a wild last struggle there high in Triton's atmosphere, high above the pit of the giant sun-ray, with the mighty pale beam of that ray passing up and out toward the sun and still beside us! Like demons the Neptunians were fighting now, but we were wrought up to the fiercest pitch of battle ourselves, and as Marlin gave his orders, we were swooping upon them with insensate fury, cylinder and space-flier crashing together there above Triton or falling beneath the slicing sweeps of the weapon-rays that again raged thick around us! Faster, ever faster, fell the outnumbered cylinders before our wild attack, until at last but a score were left—a dozen—a half-dozen—and then those, too, were gone, the last of the Neptunians' mighty fleet of cylinders annihilated! And now as from our hovering space-fliers, still over a thousand in number, there came muffled, wild cheers, our eyes were shifting downward, down to the great pit from which the sun-ray sprang, down to the twenty control-boxes in the sides of that pit!
"Down to the pit—down to the controls!" Marlin was shouting over the wild uproar in our and the other fliers. "Every one of those control-boxes must be destroyed before we can halt the ray!"
"We'll halt the great ray now!" I cried to him, as our space-fliers swooped downward now toward the giant pit of the ray. "We've wiped out their last forces and we can——"
"But look—those great domes around the pit below!" It was Whitely's hoarse shout that broke in upon me. "They're great domed forts—great domed forts guarding the giant sun-ray's pit and controls!"
For as we shot down toward the great pit of the mighty force-ray we had seen clearly now the scores of giant domed, humped shapes on Triton's roof around that pit, which we had vaguely discerned from high above. And they were, as Whitely cried to us, great forts! Giant domed forts of inconceivably thick and strong metal, each hundreds of feet in height, with openings here and there in them from which countless deadly weapon-rays could be emitted. And these great domed forts, over a hundred in number, were moving, were wheeling this way and that smoothly and swiftly on Triton's roof, were circling slowly on that roof about the pit of the giant sun-ray, guarding that pit and the control-boxes in its walls! Even as we heard Whitely's cry in that moment, as we flashed down toward them, we realized that the Neptunians had constructed those mighty moving forts of metal to guard their great force-ray's controls from our attack, placing more than a hundred of them around the pit of the great sun-ray, and a half-score of them, as we had perceived, around the pit of the other great force-ray on Triton's other side! And then, in the moment that Whitely cried out and that we saw those great forts moving like smooth-gliding mountains of metal beneath us, there had rained upward from them toward us a staggering, withering storm of concentrated force-rays!
Reeling, staggering, falling, our fleet spun in crazy disorder in the next moment as that terrific fire from beneath decimated us! And though in the next instant Marlin's voice rang steel-clear with an order, though in answer to that order our own concentrated rays radiated down madly toward those gliding mountain-like domed forts beneath us, it seemed that our rays had no effect upon them! For so stupendous in thickness and strength were those giant domed forts of metal, that instead of cleaving through them our rays could do no more than crumple and dent somewhat their smooth outer surfaces! They were invulnerable, almost, to our attack, and though one of them was crumpled into twisted metal by scores of our rays happening to converge upon it, the others were almost unharmed and were raking us with a terrible, annihilating rain of rays as we shot down over them!
Down and down—and then as I shot our space-flier down foremost of our mass of fliers through that wild tornado of deadly rays, I saw the great pit's opening looming full beneath us, the giant pale beam coming up from that opening, the twenty vital control-boxes set at equal intervals around its walls! Toward one of those control-boxes our own flier was whirling beneath my hands, and then Randall drove out like light our piercing weapon-rays toward that control-box, clove through and wrecked it instantly! But it was but one of twenty, and in the next instant our space-fliers, unable longer to withstand that terrific fire of rays from the gathering domed forts around the pit, were staggering upward, none other of our fliers having progressed as far down as ours, and none other of the twenty control-boxes being destroyed! And as our space-fliers reeled thus upward, unable to reach the control-boxes in the pit against the awful fire of the gathered domed forts about it, we saw that more than a hundred of our fliers had fallen beneath the terrific fire of rays from the forts in our mad rush downward!
"Those twenty control-boxes!" Marlin was crying. "We've got to destroy every one before the sun-ray will halt!"
"But we can't with these giant moving forts against us!" Whitely cried. "They're wiping us out—they will have destroyed us in minutes!"
"We'll hold it to the end, then!" Marlin shouted. "We've fought our way out through the solar system to this great ray, and unless we halt it now it means death for the solar system in a score more days! Down again to the attack!"