They had come to an open glade, nearly circular, and as flat as a pool. The dark trees grew about it, straight as pillars and jealously close together. In the center of the clearing stood a rock as big as a house, mysterious and huge. It seemed to be shaped, cunningly and wisely, and yet there was no shape in the memory to match it. A short, heavy green moss covered the rock with soft pile. The edifice was something like an altar that had melted and run down over itself. In one side of the rock there was a small black cave fringed with five-fingered ferns, and from the cave a little stream
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