by bench. "Take him to the timbering crew in the extension of tunnel thirteen at the thirty-sixth level and tell the Vental in charge to give him light work and see that no harm befalls him, for such are the commands of the thagosto—go! But wait! here is his number. Fasten it upon his shoulder."
The warrior took the circular piece of fabric with black hieroglyphics stamped upon it and affixed it with a metal clasp to the left shoulder of Tarzan’s green tunic and then, motioning the ape-man to precede him, quit the chamber.
Tarzan now found himself in a short, dark corridor which presently opened into a wider and lighter one along which innumerable, unladen slaves were moving in the same direction that his guard now escorted him. He noticed that the floor of the corridor had a constant downward gradient and that it turned ever to the right, forming a great spiral leading downward into the earth. The walls and ceiling were timbered and the floor paved with flat stones, worn smooth by the millions of sandaled feet that had passed over them. At sufficiently frequent intervals candles were set in niches in the left-hand wall, and, also at regular intervals, other corridors opened out of it. Over each of these openings were more of the strange hieroglyphics of Minuni. As Tarzan was to learn later, these designated the levels at which the tunnels lay and led to circular corri-
