I was not so sure of that, myself, for my sense of direction and that of location are very well developed within me. The degree of perfection attained in orientation by many officers of the International Peace Fleet has been described as almost miraculous, and even among such as these my ability in this line was a matter of comment. I was glad, therefore, that the fellow had warned me, since now I should be particularly upon the watch for each slightest scrap of information that would fix in my memory whatever route I might be led over. From the cave in which I regained consciousness there was but a single route to the mouth of the tunnel, but from here on into the city I must watch every turn and fork and crossing and draw upon the tablets of my memory an accurate and detailed map of the entire route. “We do not even have to confine our prisoners,” continued Gapth, “after we have so marked them that their ownership may always be determined.” “How do you mark them?” I asked. “With heated irons we make the mark of the owner here,” and he touched my forehead just above my eyes. “Pleasant,” I thought to myself, and then aloud: “Shall I belong to you?” “I do not know,” he replied, “but you will belong to whomever The Twentyfour allot you.” We moved on after we left the cave for a considerable period of time in silence. I was busy making mental notes of every salient feature that might be useful to me in retracing my steps, but I found nothing other than a winding and gently ascending corridor, without crossings or branches, until we reached the foot of a long flight of stone steps at the summit of which we emerged into a large chamber in the walls of which there must have been at least a dozen doorways, where, to my great disappointment, I was immediately blindfolded. They whirled me around then, but evidently it was done perfunctorily, since it was exactly one full turn and I was halted in my tracks facing precisely in the same direction that I had been before. This I was positive of, for our powers of orientation are often tested in this way in the air service. Then they marched me straight forward across the room through a doorway directly opposite that at which I had entered the chamber. I could tell when we left the larger chamber and entered the corridor from the different sound which our footsteps made. We advanced along this corridor ninety-seven paces, when we turned abruptly to the right and at the end of thirty-three paces emerged into another chamber, as I could easily tell again from the sound of our footsteps the instant we crossed the threshold. They led me about this chamber a couple of times with the evident intention of bewildering me, but in this they did not succeed, for when they turned again into a corridor I knew that it was the same corridor from which I had just emerged and that I was retracing my steps. This time they took me back thirty-three paces and then turned abruptly to the right.