Then I realized with a start that I was spending more time in these gloomy tunnels than I cared for, and began to hunt for the steps by which Conan had ascended. I found them and, following them up, breathed again deeply in relief as the sudden glow of daylight filled the shaft. I came out upon the ledge, now worn away until it was little more than a bump on the face of the cliff. And I saw the great river, which had roared like a prisoned monster between the sheer walls of its narrow canyon, had dwindled away with the passing eons until it was no more than a tiny stream, far beneath me, trickling soundlessly among the stones on its way to the sea.