As the airlock swung open, Arcot and Morey headed out through the breach in the wall. A moment later, they were inside the ship. The heavy door hissed closed behind them as they settled to the floor.
"I'll take the controls," Arcot said. "Morey, head for the rear; you take the moleculars and take Torlos with you to handle the heat beam." He turned and ran toward the control room, where Wade and Fuller were waiting. "Wade, take the forward molecular beams; Fuller, you handle the heat projector."
Arcot strapped himself into the control chair.
Suddenly, there was a terrific explosion, and the titanic mass of the ship was rocked by the detonation of a bomb one of the men in the building had fired at the ship.
Torlos had evidently understood the operation of the heat beam projector quickly; the stabbing beam reached out, and the great tower, from floor to roof, suddenly leaned over and slumped as the entire side of the building was converted into a mass of glowing stone and molten steel. Then it crashed heavily to the ground a half mile below.
But already there were forty of the great battleships rising to meet them.
"I think we'd better get moving," Arcot said. "We can't let a magnetic ray touch us now; it would kill Torlos. I'm going to cut in the invisibility units, so don't use the heat beams whatever you do!"
Arcot snapped the ship into invisibility and darted to one side. The enemy ships suddenly halted in their wild rush and looked around in amazement for their opponent.
Arcot was heading for the magnetic force field which surrounded the city when Torlos made a mistake. He turned the powerful heat beam downwards and picked off an enemy battleship. It fell, a blazing wreck, but the ray touched a building behind it, and the ionized air established a conducting path between the ship and the planet.
The apparatus was not designed to make a planet invisible, but it made a noble effort. As a result one of the tubes blew, and the Ancient Mariner was visible again. Arcot had no time to replace the tube; the Satorian fleet kept him too busy.