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Rh desire to discover the haunts of civilized men in this beautiful, yet forbidding, spot.

Below us upon the river's bank the great white apes were devouring the last remnants of Tars Tarkas' former companions, while great herds of plant men grazed in ever-widening circles about the sward which they kept as close clipped as the smoothest of lawns.

Knowing that attack from the tree was now improbable, we determined to explore the cave, which we had every reason to believe was but a continuation of the path we had already traversed, leading the gods alone knew where, but quite evidently away from this valley of grim ferocity.

As we advanced we found a well-proportioned tunnel cut from the solid cliff. Its walls rose some twenty feet above the floor, which was about five feet in width. The roof was arched. We had no means of making a light, and so groped our way slowly into the ever-increasing darkness, Tars Tarkas keeping in touch with one wall while I felt along the other, while, to prevent our wandering into diverging branches and becoming separated or lost in some intricate and labyrinthine maze, we clasped hands.

How far we traversed the tunnel in this manner I do not know, but presently we came to an obstruction which blocked our further progress. It seemed more like a partition than a sudden ending of the