The Chief got up and paced the floor agitatedly. It was plain that this business was worrying him. Miro continued to sit calmly, seemingly indifferent. "It's uncanny, I tell you. Gone as though empty space had swallowed them up."

"You've applied routine methods, of course," Grant ventured.

"Of course," the Chief waved it aside impatiently. "But we can't discover a thing. Battle fliers have patrolled the area without success. The last ship was literally snatched away right under the nose of a convoy. One minute it was in radio communication, and the next—whiff—it was gone."

"Where is this area you mention?" Already Pemberton's razor-edged brain was at work on the problem.

"Within a radius of five million miles from Jupiter. We've naturally considered placing an embargo upon that territory, but that would mean cutting off all of the satellites from the rest of the system."

Miro stirred. His smooth slurred voice rolled out.

"And my planet would suffer, my friend. Alas, it has already suffered too much." He evoked a sigh from somewhere in the depths of his barrel chest, and tried to cast up his small red eyes.

Grant suffered too, a faint disgust. Damn his eyes, what business had an erstwhile pirate, not too recently reformed, being self-righteous?

"Miro thinks," the Chief continued unheeding, "that the Callistans know more about this than they admit. He has a theory that Callisto is somehow gathering up these ships to use in a surprise attack against his own planet, Ganymede. He says Callisto has always hated them."

"Damn good reason," Grant said laconically.