There was a slight mockery in the words. Janus flushed a little as he said: "This is damned awkward, Perrin. You did save our lives, but we were sent out here to get you, you're wanted on three planets."

"Three? I thought it was four," said Perrin, still smiling. "But I quite understand, Commander, and I ask no favors. As for saving your lives, that was a side issue. I really came to take a crack at that Brain. What did you think of our duel?"

"Interesting," murmured Janus. He was still uncomfortable, wavering between his duty and his debt of honor.

"Yes, wasn't it?" Perrin said. "You know, that thing's getting more powerful than I ever thought possible! Oh, sure, I've had a couple of other encounters with it. It's too canny to let me get a good crack at it, but how it hates me! I've been hanging around out here to see what it's up to."

"Then you know about that fleet of space-ships down there," Devries spoke up. "What do you think? Is that Brain going to direct that fleet toward the inner planets by remote control?"

"No," replied Perrin, reflectively. "That's not too fantastic a thought, but the Brain's not that powerful yet. However, those Proktols might man the ships. I think that's the plan. Did you notice those antennae they have? That's the way the Brain contacts them, and it might control them from any distance! Another thing: did you notice their flame-pistols? Modelled after the ones the Martians use, but an improvement. If you men left any atom-blasts there, the Brain'll soon find out how they click, and they'll turn out their own. And they'll be an improvement. That entire space fleet will be equipped with them. But that fleet's not quite ready to move yet; they've got to have fuel."

"You mean," said Devries, "they haven't any?"

Perrin laughed softly. "They did have. Those Proktols were mining it on Neptune—greenish grained stuff, something like the Tynyte we get from the Mars mountains. I watched their operations awhile, secretly. It seems to be pretty hard stuff to get out. I waited until they had quite a supply, then I swooped down and blasted it all sky high, together with a few score Proktols. That's just one more reason they hate me. But they're still mining, and getting more of the fuel out."

Janus had been listening to the pirate's words. Now he paced the control room, nervously. "That would give us time," he said softly to himself. "We could get back to Earth in a week, at full speed." He stopped and looked up. "Yes," he said aloud, "we're going back to Earth immediately!"

"Very well, Commander Janus," said Perrin, looking straight at him. "But I trust you will take the Princess in tow? I love that ship very much."