ent marble of exquisite whiteness. Before us rose a
golden temple wrought in the most wondrous and fanciful designs, inlaid
with diamond, ruby, sapphire, turquoise, emerald, and the thousand
nameless gems of Mars, which far transcend in loveliness and purity of
ray the most priceless stones of Earth.

"This way," cried Xodar, leading us toward the entrance to a tunnel
which opened in the courtyard beside the temple. Just as we were on
the point of descending we heard a deep-toned roar burst from the
Temple of Issus, which we had but just quitted, and then a red man,
Djor Kantos, padwar of the fifth utan, broke from a nearby gate, crying
to us to return.

"The blacks have fired the temple," he cried. "In a thousand places it
is burning now. Haste to the outer gardens, or you are lost."

As he spoke we saw smoke pouring from a dozen windows looking out upon
the courtyard of the Temple of the Sun, and far above the highest
minaret of Issus hung an ever-growing pall of smoke.

"Go back! Go back!" I cried to those who had accompanied me. "The
way! Xodar; point the way and leave me. I shall reach my Princess
yet."

"Follow me, John Carter," replied Xodar, and without waiting for my
reply he dashed down into the tunnel at our feet. At his heels I ran
down through a half-dozen tiers of galleries, until at last he led me
along a level floor at the end of which I discerned a lighted chamber.

Massive bars blocked our further progress, but beyond I saw her--my
incomparable Princess, and with her were Thuvia and Phaidor. When she
saw me she rushed toward the bars that separated us. Already the
chamber had turned upon its slow way so far that but a portion of the
opening in the temple wall was opposite the barred end of the corridor.
Slowly the interval was closing. In a short time there would be but a
tiny crack, and then even that would be closed, and for a long
Barsoomian year the chamber would slowly revolve until once more for a
brief day the aperture in its wall would pass the corridor's end.

But in the meantime what horrible things would go on within that
chamber!

"Xodar!" I cried. "Can no power stop this awful revolving thing? Is
there none who holds the secret of these terrible bars?"

"None, I fear, whom we could fetch in time, though I shall go and make
the attempt. Wait for me here."

After he had left I stood and talked with Dejah Thoris, and she
stretched her dear hand through those cruel b