At the same time I was doing a little thinking on my own account The casual manner in which Ho Ran Kim had sentenced me to death had rather taken my breath away. He seemed so friendly that it didn't seem possible that he was in earnest, but a glance at the glint in those blue eyes assured me that he was not being facetious.

"I am sure," I said, "that the history of Horz must be most interesting; but right now I am most interested in learning why I should have to die for befriending a fighting man of Horz."

"That I shall explain," he said.

"It is going to take a great deal of explaining, your majesty," I assured him.

He paid no attention to that, but continued. "The inhabitants of Horz are, as far as we know, the sole remaining remnant of the once dominant race of Barsoom, the Orovars. A million years ago our ships ranged the five great oceans, which we ruled. The city of Horz was not only the capital of a great empire, it was the seat of learning and culture of the most glorious race of human beings a world has ever known. Our empire spread from pole to pole. There were other races on Barsoom, but they were few in numbers and negligible in importance. We looked upon them as inferior creatures. The Orovars owned Barsoom, which was divided among a score of powerful jeddaks. They were a happy, prosperous, contented people, the various nations seldom warring upon one another. Horz had enjoyed a thousand years of peace.

"They had reached the ultimate pinnacle of civilization and perfection when the first shadow of impending fate darkened their horizon—the seas began to recede, the atmosphere to grow more tenuous. What science had long predicted was coming to pass—a world was dying.

"For ages our cities followed the receding waters. Straits and bays, canals and lakes dried up. Prosperous seaports became deserted inland cities. Famine came. Hungry hordes made war upon the more fortunate. The growing hordes of wild green men overran what had once been fertile farm land, preying upon all.

"The atmosphere became so tenuous that it was difficult to breathe. Scientists were working upon an atmosphere plant, but before it was completed and in successful operation all but a few of the inhabitants of Barsoom had died. Only the hardiest survived—the green men, the red men, and a few Orovars; then life became merely a battle for the survival of the fittest.