But at last, when the enemy cruiser showed on the viso-screen, unmistakably for what it was--a pirate craft, it showed by its sudden maneuver that it had detected the I.S.P. cruiser. For it had described a parabola in space and headed for the dangerous asteroid belt. As if navigated by a masterly hand that knew each and every orbit of the asteroids, it plunged directly into the asteroid drift, hoping to lose the I.S.P. cruiser with such a maneuver. Ordinarily, it would have succeeded, no I.S.P. patrol ship would have dared to venture into such a trap without specific orders. But to Dennis Brooke, directing the chase from the control room, even certain death was welcome, if only he could take Koerber with him. Weaving through the deadly belt for several hours, Dennis saw his quarry slow down. Instantly he seized the chance and ordered a salvo from starboard. Koerber's powerful spacer reeled, dived and came up spewing Genton-shells. The battle was on at last. From the banked atom-cannon of the I.S.P. Cruiser, a deadly curtain of atomic fire blazed at the pirate craft. A ragged rent back toward midship showed on Koerber's Cruiser which trembled as if it had been mortally wounded. Then Dennis maneuvered his cruiser into a power dive as a rain of Genton-shells swept the space lane above him, but as he came up, a lone shell struck. At such close range, super-armor was ripped, second armor penetrated and the magnificent vessel shook under the detonating impact. It was then that Dennis Brooke saw the immense dark shadow looming immediately behind Koerber's ship. He saw the pirate cruiser zoom desperately in an effort to break the gravity trap of the looming mass, but too late. It struggled like a fly caught in a spider-web to no avail. It was then that Koerber played his last card. Sensing he was doomed, he tried to draw the I.S.P. Cruiser down with him. A powerful magnetic beam lashed out to spear the I.S.P. Cruiser. * * * * * With a wrenching turn that almost threw them out of control, Dennis maneuvered to avoid the beam. Again Koerber's beam lashed out, as he sank lower into the looming mass, and again Dennis anticipating the maneuver avoided it. "George Randall!" He shouted desperately into the speaker. "Cut all jets in the rocket room! Hurry, man!" He banked again and then zoomed out of the increasing gravity trap. "Randall! I've got to use the magnetic repulsion plates.... Cut all the jets!" But there was no response. Randall's screen remained blank. Then Koerber's lashing magnetic beam touched and the I.S.P. ship was caught, forced to follow the pirate ship's plunge like the weight at the end of a whiplash. Koerber's gunners sent one parting shot, an atom-blast that shook the trapped cruiser like a leaf.