She came. I suppose it was no more than an hour: it seemed an eternity of apprehension. There was the slight hissing of the seal of my door. The panel slid. I had leaped from my bunk where in the darkness I was lying tense. "Prince?" I did not dare say, "Anita." "Gregg." Her voice. My gaze swept the deck as the panel opened. Neither Coniston nor anyone else was in sight, save Anita's dark-robed figure which came into my room. "You got it?" I asked her in a low whisper. I held her for an instant, kissed her. But she pushed me away with quick hands. "Gregg, dear--" She was breathless. My kisses, and the tenseness of what lay before us were to blame. "Gregg, see, I have it. Give us a little light--we must hurry!" In the blue dimness I saw that she was holding one of the Martian cylinders. The smallest size; it would paralyze, but not kill. "Only one, Anita?" "Yes. I had it before, but Miko took it from me. It was in his room. And this--" The invisible cloak. We laid it on my grid, and I adjusted its mechanism. A cloak of the reflecting-absorbing variety.[A] [A] The principle of this invisible cloak involves the use of an electronized fabric. All color is absorbed. The light rays reflected to the eye of the observer thus show an image of empty blackness. There is also created about the cloak a magnetic field which by natural laws bends the rays of light from objects behind it. This principle of the natural bending of light when passing through a magnetic field was first recognized by Albert Einstein, a scientist of the Twentieth century. In the case of this invisible cloak, the bending light rays, by making visible what was behind the cloak's blackness, thus destroyed its solid black outline and gave a pseudo-invisibility which was fairly effective under favorable conditions. * * * * * I donned it, and drew its hood, and threw on its current. "All right, Anita?" "Yes." "Can you see me?" "No." She stepped back a foot or two further. "Not from here. But you must let no one approach too close." Then she came forward, put out her hand, fumbled until she found me. It was our plan to have me follow her out. Anyone observing us would see only the robed figure of the supposed George Prince, and I would escape notice. The situation about the ship was almost unchanged. Anita had secured the weapon and the cloak and slipped away to my cubby without being observed. "You're sure of that?" "I think so, Gregg. I was careful." Moa was now in the lounge, guarding the passengers. Hahn was asleep in the chart-room; Coniston was in the turret. Coniston would be off duty presently, Anita said, with Hahn taking his place. There were look-outs in the forward and stern watch-towers, and a guard upon Snap in the helio-room. "Is he inside the room, Anita?" "Snap? Yes." "No--the guard." "No. He was sitting upon the spider bridge at the door." * * * * *