Did his sudden appearance strike terror into Nina? She was holding herself tense; not speaking, nor glancing at me, but staring seemingly fascinated by the man's gargoyle aspect. He perhaps did not notice us, and yet I had the feeling that his little eyes under the lumpy forehead had flung us a peering glance. When he had gone past and vanished, back toward the stem on the other side deck, it seemed to me that the girl was shuddering. "What is it?" I whispered. "N-nothing." "You're afraid of that fellow, Nina?" "No! Oh no!" Her unnecessary vehemence seemed to belie her words. The thing had so startled me that I had relaxed my caution. I realized it, as abruptly, from the ladder-steps which led up to the control turret on the roof of the superstructure almost over us, a long, lanky, white-uniformed figure was disclosed coming down. It was the ship's First Officer, young William Wilson. He was a handsome young giant. He smiled at us--mostly at Nina, and lounged into the chair beside her. I had no further chance to be with the girl alone. A light meal was served us by one of the stewards, there on deck. The radio-helio operator, young Len Smith, had joined us. The squat, heavy-faced James Polter, ship's Purser, added himself to us; and then the fat, jolly, moon-faced little Peter Green, Second Officer, came puffing down from the chart room behind the control turret and drew up a chair. It was as though the girl were a magnet. I left them presently. From back along the side-deck where I stood apparently gazing through a bull's-eye at the vast wonders of the glittering Heavens in which the little _X-87_ was hanging, I could see the group of men around Nina on the fore-deck, a gay little party in the moonlight. Why was Nina so terrified of that ugly hunchback? I had inquired about him casually from young Len Smith. His name was Durk; a new member of the crew, engaged to replace one of those so mysteriously sick. This was his first voyage.... Five of the crew, Nina had said. I was to tell the Captain about it. Vehemently now I wanted a talk with Mackensie. We'd have to chance an eavesdropper; if I was alert, my detector should warn me; and the promptness with which we had discovered the eavesdropping ray before, I figured would warn the fellow not to use it again.