In front of us the mangroves widened out and filled the canal. On our right the lesser walls of Tau, sombre blocks smoothed and squared and set with a cold, mathematical nicety that filled me with vague awe, slipped by. Through breaks I caught glimpses of dark ruins and of great fallen stones that seemed to crouch and menace us, as we passed. Somewhere there, hidden, were the seven globes that poured the moon fire down upon the Moon Pool.

Now we were among the mangroves and, sail down, the three of us pushed and pulled the boat through their tangled roots and branches. The noise of our passing split the silence like a profanation, and from the ancient bastions came murmurs⁠—forbidding, strangely sinister. And now we were through, floating on a little open space of shadow-filled water. Before us lifted the gateway of Nan-Tauach, gigantic, broken, incredibly old; shattered portals through which had passed men and women of Earth’s dawn; old with a weight of years that pressed leadenly upon the eyes that looked upon it, and yet was in some curious indefinable way⁠—menacingly defiant.