The room, the⁠—hollow⁠—in which we stood was faceted like a diamond; and like a cut brilliant its sides glistened⁠—though dully. Its shape was a deep oval, and our path dropped down to a circular polished base, roughly two yards in diameter. Glancing behind me I saw that in the closing of the entrance there had been left no trace of it save the steps that led from where that entrance had been⁠—and as I looked these steps turned , leaving us isolated upon the circle, only the faceted walls about us⁠—and in each of the gleaming faces the three of us reflected⁠—dimly. It was as though we were within a diamond egg whose graven angles had been turned inward .