The "cans" were thrown, ultra-and infra-beams were driven, the furious macro-beam gnawed hungrily at the Nevian's defenses; and one by one those defenses went down. In desperation the enemy commander threw his every generator behind a polycyclic screen; only to see Cleveland's even more powerful drill bore relentlessly through it. Punctured that last defense, the end came soon. A secondary SX7 beam was now in place on mighty Ten's inner rings, and one fierce blast blew a hole completely through the Nevian cruiser. Into that hole entered Adlington's terrific bombs and their gruesome fellows, and where they entered, life departed. All defenses vanished, and under the blasts of the _Boise_'s projectors, now unopposed, the metal of the Nevian vessel exploded instantly into a widely spreading cloud of vapor. Sparkling vapor, with perhaps here and there a droplet or two of material which had only been liquefied. So passed the sister-ship, and Rodebush turned his plates upon the vessel of Nerado. But that highly intelligent amphibian had seen all that had occurred. He had long since given over the pursuit of the speedster, and he did not rush in to do hopeless battle beside his fellow Nevians against the Terrestrials. His analytical detectors had written down each detail of every weapon and of every screen employed; and even while prodigious streamers of red force were raving out from his vessel, braking her terrific progress and swinging her around in an immense circle back toward far Nevia, his scientists and mechanics were doubling and redoubling the power of his already Titanic installations, to match and if possible to overmatch those of Triplanetary's super-dreadnaught. "Do we kill him now or do we let him suffer a while longer?" Costigan demanded. "I don't think so, yet," replied Rodebush. "Would you, Lyman?" "Not yet," replied Cleveland, grimly, reading the thought of the other and agreeing with it. "Let him pilot us to Nevia; we might not be able to find it without a guide. While we're at it we want to so pulverize that crowd that if they never come near the Solarian system again they'll think it's twenty minutes too soon!" Thus it was that the _Boise_, under only a few dynes of propulsion, pursued the Nevian ship. Apparently exerting every effort, she never came quite within range of the fleeing raider; yet never was she so far behind that the Nevian space-ship was not in clear register upon her observation plates. Nor was Nerado alone in strengthening his vessel. Costigan knew well and respected highly the Nevian scientist-captain, and at his suggestion the entire time of the long and uneventful flight was spent in re-enforcing the super-ship's armament to the iron-driven limit of theoretical and mechanical possibility.