Here arises an issue on which I am in two minds continually. In this strange world we were constantly surrounded by phenomena which were not explicable by any knowledge I possessed, nor consistent with any previous experiences. So was it here. I was accustomed to light that invaded darkness and gradually died as its source was distanced, but here was light which was sharply defined in its area,--which ended evenly and abruptly. To explain this is necessary for my narrative. But that necessity is incidental. We were surrounded by phenomena which were equally new, but which were entirely irrelevant. Sometimes I was able to imagine an explanation: sometimes not. Sometimes the cause became clear subsequently, or was told to me. I should like to tell of all these things, but I have a tale to tell also. I am of one mind to turn aside, and of another mind to go forward. But I see that if I would reach the conclusion at which I aim, I must restrain my desire to wander. We sat for some time in the darkness against the opposite wall watching the form of the Dweller, who did not move, and was still apparently sleeping. There was no means of judging the passage of time, but it was long since I had slept, and after the meal I had to confess to an increasing drowsiness, on which my companion suggested that I should use the time in sleep, which I required at shorter intervals than herself, while she would watch for us both. CHAPTER X VISIONS I do not know how long I slept, but suppose it to have been for many hours. I waked to find that nothing had changed. Invigorated by rest, I was quite willing to agree that we should wait no longer, but proceed upon our own investigations. Rising with this purpose, our eyes were first attracted to the wall behind us in which was depicted one of those living scenes with which we had already become familiar. Strange and wonderful as they then seemed, I have since realised that there were many simpler-seeming things around me which are less easily explicable. Knowing, as we do, that sight travels through space, bearing the vision of that which was, to the infinite distances, and that we ourselves can behold the stars of earlier millenniums in positions which they have long ceased to occupy, it is not difficult to understand that the Dwellers must have discovered a process by which such visions could be deflected or reflected back to the earth from which they originated, and that it was the past history of the earth which was unfolded through the walls of these dark and (as we subsequently realised) seemingly unending corridors.