She was at least safe from Hin Abtol, but what lay in the future? Immediately she was in danger of freezing to death should any mishap delay our flight before we reached a warmer latitude, and there were innumerable other hazards in the crossing of the wastelands of this dying planet.

But, being an incorrigible optimist, I still felt that Llana was safe; and so did she. Perhaps because no conceivable danger could have been greater than that which had threatened her while she lay in the power of Hin Abtol.

Presently I noticed that she was laughing, and I asked her what amused her.

"More than any other man on Barsoom, Hin Abtol feared you," she said, "and he had you in his power and did not know it. And he pitted against you, the greatest swordsman of two worlds, a clumsy oaf, when he might have loosed upon you a full utan and destroyed you. Though he would doubtless have lost half his utan. I only pray that some day he may know the opportunity he missed when he permitted John Carter, Warlord of Barsoom to escape him."

"Yes," I said, "it is amusing. So is that hole we left in the roof of his hothouse city; but I am afraid that Hin Abtol's sense of humor will not be equal to the task of appreciating it."

We sped swiftly toward the south and warmer climes, happy in our miraculous escape from the tyrant of Panar; and, fortunately, unaware of what lay in our future.

Llana of Gathol was safe—but for how long? When would we see Gathol again, or Helium?

Part 4
Invisible Men of Mars

Chapter 1

Yes, Llana of Gathol was safe at last. I had brought her from captivity in the Arctic city of Pankor, stolen her from under the very nose of Hin Abtol, the self-styled Jeddak of Jeddaks of the North; and we were speeding through the thin air of dying Mars in my own fast flier toward Gathol. I was very contented with what I had achieved, but I was also very cold.

"You said that you were taking me to Gathol," said Llana, after we had left Pankor far behind. "Nothing would make me happier than to return to my father, my mother, and my native city; but how may we hope to make a landing there while Gathol is surrounded by the warriors of Hin Abtol?"

"The Panars are a stupid, inefficient lot," I replied; "most of Hin Abtol's warriors are unwilling conscripts who have no heart in waging war for their tyrannical master. These poor frozen men only endure it because they know there is no escape and prefer life and consciousness to being returned to Pankor and frozen in again until Hin Abtol needs their swords for a future war."

"'Frozen men'!" ejaculated Llana; "what do you mean by that?"

"You heard nothing of them while you were a prisoner in Pankor?" I asked, surprised.