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Rh, was filled with the great, unsatisfied curiosity of a child.

He was never quite content merely to perceive that things happenedhe desired to know why they happened. He wanted to know what made things go. The secret of life interested him immensely. The miracle of death he could not quite fathom. Upon innumerable occasions he had investigated the internal mechanism of his kills, and once or twice he had opened the chest cavity of victims in time to see the heart still pumping. He had learned from experience that a knife thrust through this organ brought immediate death nine times out of ten, while he might stab an antagonist innumerable times in other places without even disabling him. And so he had come to think of the heart, or, as he called it, "the red thing that breathes," as the seat and origin of life.

The brain and its functionings he did not comprehend at all. That his sense perceptions were transmitted to his brain and there translated, classified, and labeled was something quite beyond him. He thought that his fingers knew when they touched something, that his eyes knew when they saw, his ears when they heard, his nose when it scented. He considered his throat, epidermis, and the hairs of his head as the three principal seats of emotion. When Kala had been slain a peculiar choking sensation had possessed his throat; contact with Histah,