You would not survive a dozen dawns and you would be cold and hungry and miserable-a wretched outcast in a hostile world. Here you have every luxury that the mind of man can devise or the hand of man produce, and you are occupied with work of such engrossing interest that your every hour must be fruitful of unparalleled satisfaction. There is no selfish reason, therefore, why you should leave me and there is every reason why you should remain. I expect no loyalty other than that which may be prompted by egoism. You make an ideal assistant, not only for the reasons I have just given you, but because you are intelligent and quick-witted, and now I have decided, after observing you carefully for a sufficient time, that you can serve me in yet another capacity-that of personal bodyguard.

"You may have noticed that I alone of all those connected with my laboratory am armed. This is unusual upon Barsoom, where people of all classes, and all ages and both sexes habitually go unarmed. But many of these people I could not trust armed as they would slay me; and were I to give arms to those whom I might trust, who knows but that the others would obtain possession of them and slay me, or even those whom I had trusted turn against me, for there is not one who might not wish to go forth from this place back among his own people-only you, Vad Varo, for there is no other place for you to go. So I have decided to give you weapons.

"You saved my life once. A similar opportunity might again present itself. I know that being a reasoning and reasonable creature, you will not slay me, for you have nothing to gain and everything to lose by my death, which would leave you friendless and unprotected in a world of strangers where assassination is the order of society and natural death one of the rarest of phenomena. Here are your arms." He stepped to a cabinet which he unlocked, displaying an assortment of weapons, and selected for me a long-sword, a short-sword, a pistol and a dagger.

"You seem sure of my loyalty, Ras Thavas," I said.

He shrugged his shoulders. "I am only sure that I know perfectly where your interests lie-sentimentalists have words: love, loyalty, friendship, enmity, jealousy, hate, a thousand others; a waste of words — one word defines them all: self-interest. All men of intelligence realize this. They analyse an individual and by his predilections and his needs they classify him as friend or foe, leaving to the weak-minded idiots who like to be deceived the drooling drivel of sentiment."

I smiled as I buckled my weapons to my harness, but I held my peace. Nothing could be gained by arguing with the man and, too, I felt quite sure that in any purely academic controversy I should get the worst of it; but many of the matters of which he had spoken had aroused my curiosity and one had reawakened in my mind a matter to which I had given considerable thought. While partially explained by some of his remarks I still wondered why the red-man from whom I had rescued him had seemed so venomously bent upon slaying him the day of my advent upon Barsoom, and so, as we sat chatting after our evening meal, I asked him.

"A sentimentalist," he said. "A sentimentalist of the most pronounced type. Why that fellow hated me with a venom absolutely unbelievable by any of the reactions of a trained, analytical mind such as mine; but having witnessed his reactions I become cognizant of a state of mind that I cannot of myself even imagine. Consider the facts. He was the victim of assassination-a young warrior in the prime of life, possessing a handsome face and a splendid physique. One of my agents paid his relatives a satisfactory sum for the corpse and brought it to me. It is thus that I obtain practically all of my material. I treated it in the manner with which you are familiar. For a year the body lay in the laboratory, there being no occasion during that time that I had use for it; but eventually a rich client came, a not overly prepossessing man of considerable years. He had fallen desperately in love with a young woman who was attended by many handsome suitors. My client had more money than any of them, more brains, more experience, but he lacked the one thing that each of the others had that always weighs heavily with the undeveloped, unreasoning, sentiment-ridden minds of young females-good looks."

"Now 378-J-493811-P had what my client lacked and could afford to purchase. Quickly we reached an agreement as to price and I transferred the brain of my rich client to the head of 378-J-493811-P and my client went away and for all I know won the hand of the beautiful moron; and 378-J-493811-P might have rested on indefinitely upon his ersite slab until I needed him or a part of him in my work, had I not, merely by chance, selected him for resurgence because of an existing need for another male slave.

"Mind you now, the man had been murdered. He was dead. I bought and paid for the corpse and all there was in it. He might have lain dead forever upon one of my ersite slabs had I not breathed new life into his dead veins.