Under the Mountains
my enemies, my ears were on the alert; yet I heard no sound of pursuit. The passageway was dimly lighted hy occasional radium bulbs the universal lighting medium of Barsoom.
These same lamps may have been doing continuous duty in these subterranean chambers for ages, since they require no attention and are so compounded that they give off but the minutest of their substance in the generation of years of luminosity.
We had proceeded for but a short distance when we commenced to pass the mouths of diverging corridors, but not once did Woola hesitate. It was at the opening to one of these corridors upon my right that I presently heard a sound that spoke more plainly to John Carter, fighting man, than could the words of my mother tongue—it was the clank of metal—the metal of a warrior's harness—and it came from a little distance up the corridor upon my right.
Woola heard it, too, and like a flash he had wheeled and stood facing the threatened danger, his mane all abristle and all his rows of glistening fangs bared by snarling, backdrawn lips. With a gesture I silenced him, and to-
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