The interior of the ship was suddenly singing with the steward's siren--the call to awaken the passengers. It startled me. I moved swiftly away. But as the siren shut off, in the silence I heard a soft, musical voice: "Wake up, Anita, I think that's the breakfast call." And her answer, "All right, George." IV I did not appear at that morning meal. I was exhausted and drugged with lack of sleep. I had a moment with Snap to tell him what had occurred. Then I sought out Carter. He had his little chart room insulated. And we were cautious. I told him what Snap and I had learned: the rays from the Moon, proving that Grantline had concentrated a considerable ore body. I also told him of Grantline's message. "We'll stop on the way back, as he directs, Gregg." He bent closer to me. "At Ferrok-Shahn I'm going to bring back a cordon of Interplanetary Police. The secret will be out, of course, when we stop at the Moon. We have no right, even now, to be flying this vessel as unguarded as it is." He was very solemn. And he was grim when I told him of the invisible eavesdropper. "You think he overheard Grantline's message? Who was it? You seem to feel it was George Prince?" I told him I was convinced the prowler went into A20. When I mentioned the purser, who seemed to have been watching me earlier in the night, and again was sitting in the smoking room when the eavesdropper fled past, Carter looked startled. "Johnson is all right, Gregg." "Does he know anything about this Grantline affair?" "No--no," said Carter hastily. "You haven't mentioned it, have you?" "Of course I haven't. But why didn't Johnson hear that eavesdropper? And what was he doing there, anyway, at that hour of the morning?" The Captain ignored my questions. "I'm going to have that Prince suite searched--we can't be too careful.... Go to bed, Gregg, you need rest." I went to my cabin. It was located aft, on the stern deck, near the stern watch tower. A small metal room with a chair, a desk and a bunk. I made sure no one was in it. I sealed the lattice grill and the door, set the alarm trigger against any opening of them, and went to bed. The siren for the midday meal awakened me. I had slept heavily. I felt refreshed. I found the passengers already assembled at my table when I arrived in the dining salon. It was a low vaulted metal room with blue and yellow tube lights. At its sides the oval windows showed the deck, with its ports on the dome side, through which a vista of the starry firmament was visible. We were well on our course to Mars. The Moon had dwindled to a pin point of light beside the crescent Earth. And behind them our Sun blazed, visually the largest orb in the heavens. It was some sixty-eight million miles from the Earth to Mars. A flight, ordinarily, of some ten days. There were five tables in the dining salon, each with eight seats. Snap and I had one of the tables. We sat at the ends, with the passengers on each of the sides.