But it is the unknown that terrifies. I do not suppose that the Killers were exceptionally intelligent. All the evidence is against it. Yet this episode of the closing door, because it was beyond my understanding, was more daunting than would have been a far more urgent danger of a familiar kind. I stood there in a panic fear which it shames me to remember, feeling that I was surrounded by those who watched and mocked in the darkness. I think, also, that the increasing cold of the night, and the loss of my companion’s vitality, may have assisted to depress me. Anyway, I stood there for some time, afraid to move, in a terror more abject than anything I had felt since I waited for the first dawn, on the mystery of the opal pavement. Nothing happened. The noises ceased in the roof. The moon clouded, and the narrow windows darkened. At last, I stepped up to one of them, and saw that a fine sleet was falling without. For the first time, with a start of shame, I recalled my companion. I had promised to keep my mind in touch with hers, and had forgotten her entirely while I shrank from shadows. The next moment we were in communication. She had been waiting to report, and to hear from me, in a natural doubt as to the meaning of my silence, but her thought showed no agitation, and learning that she was in apparent security, and that her own report had no urgency, I first explained what had happened. What she thought I cannot say, for her mind closed for a moment. Then it answered quietly: “Shall I come back and push it open again? Perhaps I had better tell you first what I have seen and heard. “First, there is the open tank, which was boiling, as when you saw it. There are few bodies in it. I suppose it is kept boiling continually. Beyond this are the killing-sheds. There are two of these. Each consists of ten apartments. One is empty. The other is filled. Each compartment consists of four walls of metal bars, and a roof of a very hard material. Probably it is the same as the door that has shut you in. The floors are of bars only. The boiling water extends beneath. Three days before the feast the bars will be withdrawn, and the victims will fall into the vat. I have spoken to my Leader, and this she told me. The feast is four days from now. She will say nothing, as the Leaders have decided it, but I think she has no desire to be rescued. The other nine cells are filled by victims that the Dwellers have given them. She says that these are creatures that have offended the Dwellers. They are like my description of you, but with wings.