I saw, upon the adjoining door, "A 20, _George Prince_." I listened. In the humming stillness of the ship's interior there was no sound from these cabins. A 20 was without windows, I knew. But Anita's room had a window and a door which gave upon the deck. I went through the lounge, out its arch, and walked the deck length. The deck door and window of A 22 were closed and dark. The ten-foot-wide deck was dim with white starlight from the side ports. Chairs were here, but they were all empty. From the bow windows of the arching dome a flood of moonlight threw long, slanting shadows down the deck. At the corner where the superstructure ended, I thought I saw a figure lurking as though watching me. I went that way, but it vanished. I turned the corner, went the width of the ship to the other side. There was no one in sight save the observer on his spider bridge, high in the bow network, and the second officer, on duty on the turret balcony almost directly over me. As I stood and listened, I suddenly heard footsteps. From the direction of the bow a figure came. Purser Johnson. He greeted me. "Cooling off, Gregg?" "Yes," I said. He went past me and turned into the smoking room door nearby. I stood a moment at one of the deck windows, gazing at the stars; and for no reason at all I realized I was tense. Johnson was a great one for his regular sleep--it was wholly unlike him to be roaming about the ship at such an hour. Had he been watching me? I told myself it was nonsense. I was suspicious of everyone, everything, this voyage. * * * * * I heard another step. Captain Carter appeared from his chart-room which stood in the center of the narrowing open deck space near the bow. I joined him at once. "Who was that?" he half-whispered. "Johnson." "Oh, yes." He fumbled in his uniform; his gaze swept the moonlit deck. "Gregg--take this." He handed me a small metal box. I stuffed it at once into my shirt. "An insulator," he added, swiftly. "Snap is in his office. Take it to him, Gregg. Stay with him--you'll have a measure of security--and you can help him to make the photographs." He was barely whispering. "I won't be with you--no use making it look as though we were doing anything unusual. If your graphs show anything--or if Snap picks up any message--bring it to me." He added aloud, "Well, it will be cool enough presently, Gregg." He sauntered away toward his chart-room. "By heavens, what a relief!" Snap murmured as the current went on. We had wired his cubby with the insulator; within its barrage we could at last talk with a degree of freedom. "You've seen George Prince, Gregg?" "No. He's assigned A 20. But I saw his sister. Snap, no one ever mentioned--" Snap had heard of her, but he hadn't known that she was listed for this voyage. "A real beauty, so I've heard. Accursed shame for a decent girl to have a brother like that." I could agree with him there, but I made no comment.