vague reflections of inner lights, marking the lighted chambers within the dome. Above him it was but a short distance to the apex of the dome, below was a sheer drop of four hundred huals.
Tarzan, having seen all that could be seen from the mouth of the embrasure, returned to the chamber. "How far is it, Komodoflorensal," he asked, "from the floor of this embrasure to the roof of the dome?"
"Twelve huals, perhaps," replied the Trohanadalmakusian.
Tarzan took the longest of the bars from the embrasure and measured it as best he could. "Too far," he said.
"What is too far?" demanded Komodoflorensal.
"The roof," explained Tarzan.
"What difference does it make where the roof is—you did not expect to escape by way of the roof of the dome, did you?"
"Most certainly—had it been accessible," replied the ape-man; "but now we shall have to go by way of the shaft, which will mean crossing en tirely through the dome from the interior shaft to the outer periphery. The other route would have entailed less danger of detection."
Komodoflorensal laughed aloud. "You seem to think that to escape a Minunian city it is only necessary to walk out and away. It cannot be done. What of the sentries? What of the outer
