“Is she safe?” asked Tarzan.
“She has not been harmed. She will be safe until tomorrow or the next day,” replied the old man. “But who are you, and how did you find your way here from the outer world?”
“I am Tarzan of the Apes,” replied the ape-man. “I came into this valley looking for a way out of the valley of Opar where the life of my companion was in danger. And you?”
“I am an old man,” replied the other, “and I have been here ever since I was a boy. I was a stowaway on the ship that brought Stanley to Africa after the establishment of the station on Stanley Pool, and I came into the interior with him. I went out from camp to hunt, alone, one day. I lost my way and later was captured by unfriendly natives. They took me farther into the interior to their village from which I finally escaped, but so utterly confused and lost that I had no idea what direction to take to find a trail to the coast. I wandered thus for months, until finally, upon an accursed day I found an entrance to this valley. I do not know why they did not put me to death at once, but they did not, and later they discovered that my knowledge could be turned to advantage to them. Since then I have helped them in their quarrying and mining and in their diamond cutting. I have given them iron drills with hardened points and drills tipped with diamonds. Now I am practically one of them, but always in my heart has been the hope that some day I might escape from the valley—a hopeless hope, though, I may assure you.”
“There is no way out?” asked Tarzan.
“There is a way, but it is always guarded.”
“Where is it?” queried Tarzan.
“It is a continuation of one of the mine tunnels, passing entirely through the mountain to the valley beyond. The mines have been worked by the ancestors of this race for an almost incalculable length of time. The mountains are honeycombed with their shafts and tunnels. Back of the gold-bearing quartz lies an enormous deposit of altered peridotite, which contains diamonds, in the search for which it evidently became necessary to extend one of the shafts to the opposite side of the mountain, possibly for purposes of ventilation. This tunnel and the trail leading down into Opar are the only means of ingress to the valley. From time immemorial they have kept the tunnel guarded, more particularly, I imagine, to prevent the escape of slaves than to thwart the inroads of an enemy, since they believe that there is no fear of the latter emergency. The trail to Opar they do not guard, because they no longer fear the Oparians, and know quite well that none of their Gomangani slaves would dare enter the valley of the sunworshipers. For the same reason, then, that the slaves cannot escape, we, too, must remain prisoners here forever.”
“How is the tunnel guarded?” asked Tarzan.
“Two Bolgani and a dozen or more Gomangani warriors are always upon duty there,” replied the old man.