A full two-thirds of Roger's force was caught in that raging, incandescent beam; caught and obliterated: but the remainder did not retreat to the planetoid. Darting out around the edge of the cone at a stupendous acceleration, they attacked its flanks and the engagement became general. But now, since enough beams were kept upon each ship of the enemy so that invisibility could not be restored, each Triplanetary war vessel could attack with full efficiency. Magnesium flares and star-shells illuminated space for a thousand miles, and from every unit of both fleets was being hurled every item of solid, explosive and vibratory destruction known to the warfare of that age. Offensive beams, rods and daggers of frightful power struck and were neutralized by defensive screens equally capable; the long range and furious dodging made ordinary solid, or even atomic-explosive projectiles useless; and both sides were filling all space with such a volume of blanketing frequencies that such radio-dirigible atomics as were launched could not be controlled, but darted madly and erratically hither and thither, finally to be exploded or volatilized harmlessly in mid-space by the touch of some fiercely insistant, probing beam of force. Individually, however, the pirate vessels were far more powerful than those of the fleet, and that superiority soon began to make itself felt. The power of the smaller ships began to fail as their accumulators became discharged under the awful drain of the battle, and vessel after vessel of the Triplanetary fleet was hurled into nothingness by the concentrated blasts of the pirates' rays. But the Triplanetary forces had one great advantage. In furious haste the Service men had been altering the controls of the dirigible atomic torpedoes, so that they would respond to ultra-wave control; and, few in number though they were, each was highly effective. A hard-eyed observer, face almost against his plate and both hands and both feet manipulating controls, hurled the first torpedo. Propelling rockets viciously aflame, it twisted and looped around the incandescent rods of destruction so thickly and starkly outlined, under perfect control; unaffected by the hideous distortion of all ether-borne signals. Through a pirate screen it went, and under the terrific blast of its detonation the entire midsection of the stricken battleship vanished. It should have been out, cold--but to the amazement of the observers, both ends kept on fighting with scarcely lessened power! Two more of the frightful bombs had to be launched--each remaining section had to be blown to bits--before those terrible beams went out! Not a man in that great fleet had even an inkling of the truth; that those great vessels, those awful engines of destruction, did not contain a single living creature: that they were manned and fought by automatons; robots controlled by keen-eyed, space-hardened veterans inside the pirates' planetoid!