"No doubt," he said, "you have seen that before. It does not hurt a pin-prick. But what does it show? The capacity for pain is not needed in the muscle, and it is not placed there,--is but little needed in the skin, and only here and there over the thigh is a spot capable of feeling pain. Pain is simply our intrinsic medical adviser to warn us and stimulate us. Not all living flesh is painful; nor is all nerve, not even all sensory nerve. There's no taint of pain, real pain, in the sensations of the optic nerve. If you wound the optic nerve, you merely see flashes of light,--just as disease of the auditory nerve merely means a humming in our ears. Plants do not feel pain, nor the lower animals; it's possible that such animals as the starfish and crayfish do not feel pain at all. Then with men, the more intelligent they become, the more intelligently they will see after their own welfare, and the less they will need the goad to keep them out of danger. I never yet heard of a useless thing that was not ground out of existence by evolution sooner or later. Did you? And pain gets needless.

"Then I am a religious man, Prendick, as every sane man must be. It may be, I fancy, that I have seen more of the ways of this world's Maker than you,--for I have sought his laws, in _my_ way, all my life, while you, I understand, have been collecting butterflies. And I tell you, pleasure and pain have nothing to do with heaven or hell. Pleasure and pain--bah! What is your theologian's ecstasy but Mahomet's houri in the dark? This store which men and women set on pleasure and pain, Prendick, is the mark of the beast upon them,--the mark of the beast from which they came! Pain, pain and pleasure, they are for us only so long as we wriggle in the dust.

"You see, I went on with this research just the way it led me. That is the only way I ever heard of true research going. I asked a question, devised some method of obtaining an answer, and got a fresh question. Was this possible or that possible? You cannot imagine what this means to an investigator, what an intellectual passion grows upon him! You cannot imagine the strange, colourless delight of these intellectual desires! The thing before you is no longer an animal, a fellow-creature, but a problem! Sympathetic pain,--all I know of it I remember as a thing I used to suffer from years ago. I wanted--it was the one thing I wanted--to find out the extreme limit of plasticity

"But," said I, "the thing is an abomination--"

"To this day I have never troubled about the ethics of the matter," he continued. "The study of Nature makes a man at last as remorseless as Nature. I have gone on, not heeding anything but the question I was pursuing; and the material has--dripped into the huts yonder. It is nearly eleven years since we came here, I and Montgomery and six Kanakas. I remember the green stillness of the island and the empty ocean about us, as though it was yesterday. The place seemed waiting for me.