Ras Thavas’ investigation revealed nothing. I think as it progressed that he became gradually more and more imbued with a growing suspicion that I might know more about the disappearance of Valla Dia than my attitude indicated, for I presently became aware of a delicately concealed espionage. Up to this time I had been able to smuggle food to Valla Dia every night, after Ras Thavas had retired to his quarters. Then, on one occasion, I suddenly became subconsciously aware that I was being followed, and instead of going to the vaults I went to the office, where I added some observations to my report upon a case I had handled that day. Returning to my room I hummed a few bars from “Over There,” that the suggestion of my unconcern might be accentuated. From the moment that I quit my quarters until I returned to them I was sure that eyes had been watching my every move. What was I to do? Valla Dia must have food, without it she would die; and were I to be followed to her hiding place while taking it to her, she would die; Ras Thavas would see to that. Half the night I lay awake, racking my brains for some solution to the problem. There seemed only one way—I must elude the spies. If I could do this but one single time I could carry out the balance of a plan that had occurred to me, and which was, I thought, the only one feasible that might eventually lead to the resurrection of Valla Dia in her own body. The way was long, the risks great; but I was young, in love and utterly reckless of consequences in so far as they concerned me; it was Valla Dia’s happiness alone that I could not risk too greatly, other than under dire stress. Well, the stress existed and I must risk that, even as I risked my life. My plan was formulated and I lay awake upon my sleeping silks and furs in the darkness of my room, awaiting the time when I might put it into execution. My window, which was upon the third floor, overlooked the walled enclosure, upon the scarlet sward of which I had made my first bow to Barsoom. Across the open casement I had watched Cluros, the farther moon, take his slow deliberate way. He had already set. Behind him, Thuria, his elusive mistress, fled through the heavens. In five xats (about 15 minutes) she would set; and then for about three and three quarters Earth hours the heavens would be dark, except for the stars.