Those who desired to produce the super-brain employed four methods, namely selective breeding, manipulation of the hereditary factors in germ cells (cultivated in the laboratory), manipulation of the fertilized ovum (cultivated also in the laboratory), and manipulation of the growing body. At first they produced innumerable tragic abortions. These we need not observe. But at length, several thousand years after the earliest experiments, something was produced which seemed to promise success. A human ovum had been carefully selected, fertilized in the laboratory, and largely reorganized by artificial means. By inhibiting the growth of the embryo’s body, and the lower organs of the brain itself, and at the same time greatly stimulating the growth of the cerebral hemispheres, the dauntless experimenters succeeded at last in creating an organism which consisted of a brain twelve feet across, and a body most of which was reduced to a mere vestige upon the under-surface of the brain. The only parts of the body which were allowed to attain the natural size were the arms and hands. These sinewy organs of manipulation were induced to key themselves at the shoulders into the solid masonry which formed the creature’s house. Thus they were able to get a purchase for their work. The hands were the normal six-fingered hands of the Third Men, very greatly enlarged and improved. The fantastic organism was generated and matured in a building designed to house both it and the complicated machinery which was necessary to keep it alive. A selfregulating pump, electrically driven, served it as a heart. A chemical factory poured the necessary materials into its blood and removed waste products, thus taking the place of digestive organs and the normal battery of glands. Its lungs consisted of a great room full of oxidizing tubes, through which a constant wind was driven by an electric fan. The same fan forced air through the artificial organs of speech. These organs were so constructed that the natural nerve-fibres, issuing from the speech centres of the brain, could stimulate appropriate electrical controls so as to produce sounds identical with those which they would have produced from a living throat and mouth. The sensory equipment of this trunkless brain was a blend of the natural and the artificial. The optic nerves were induced to grow out along two flexible probosces, five feet long, each of which bore a huge eye at the end. But by a very ingenious alteration of the structure of the eye, the natural lens could be moved aside at will, so that the retina could be applied to any of a great diversity of optical instruments. The ears also could be projected upon stalks, and were so arranged that the actual nerve endings could be brought into contact with artificial resonators of various kinds, or could listen directly to the miscroscopic rhythms of the most minute organisms. Scent and taste were developed as a chemical sense, which could distinguish almost all compounds and elements by their flavour. Pressure, warmth and cold were detected only by the fingers, but there with great subtlety. Sensory pain was to have been eliminated from the organism altogether; but this end was not achieved.
The creature was successfully launched upon life, and was actually kept alive for four years. But though at first all went well, in his second year the unfortunate child, if such he may be called, began to suffer severe pain, and to show symptoms of mental derangement. In spite of all that his devoted foster-parents could do, he gradually sank into insanity and died. He had succumbed to his own brain weight and to certain failures in the chemical regulation of his blood.
We may overlook the next four hundred years, during which sundry vain attempts were made to repeat the great experiment more successfully. Let us pass on to the first true individual of the fourth human species. He was produced in the same artificial manner as his forerunners, and was designed upon the same general plan. His mechanical and chemical machinery, however, was far more efficient; and his makers expected that, owing to careful adjustments of the mechanisms of growth and decay, he would prove to be immortal. His general plan, also, was changed in one important respect. His makers built a large circular “brain-turret” which they divided with many partitions, radiating from a central space, and covered everywhere with pigeon-holes. By a technique which took centuries to develop, they induced the cells of the growing embryonic brain to spread outwards, not as normal hemispheres of convolutions, but into the pigeon-holes which had been prepared for them. Thus the artificial “cranium” had to be a roomy turret of ferro-concrete some forty feet in diameter. A door and a passage led from the outer world into the centre of the turret, and thence other passages radiated between tiers of little cupboards. Innumerable tubes of glass, metal and a kind of vulcanite conveyed blood and chemicals over the whole system. Electric radiators preserved an even warmth in every cupboard, and throughout the innumerable carefully protected channels of the nerve-fibres. Thermometers, dials, pressure gauges, indicators of all sorts, informed the attendants of every physical change in this strange half-natural, half-artificial system, this preposterous factory of mind.
Eight years after its inception the organism had filled its brain room, and attained the mentality of a new-born infant. His advance to maturity seemed to his foster-parents dishearteningly slow. Not till almost at the end of his fifth decade could he be said to have reached the mental standard of a bright adolescent. But there was no real reason for disappointment. Within another decade this pioneer of the Fourth Men had learned all that the Third Men could teach him, and had also seen that a great part of their wisdom was folly. In manual dexterity he could already vie with the best; but though manipulation afforded him intense delight, he used his hands almost wholly in service of his tireless curiosity. In fact, it was evident that curiosity was his main characteristic. He was a huge bump of curiosity equipped with most cunning hands. A department of state had been created to look after his nurture and education. An army of learned persons was kept in readiness to answer his impatient questions and assist him in his own scientific experiments. Now that he had attained maturity these unfortunate pundits found themselves hopelessly outclassed, and reduced to mere clerks, bottle-washers and errand-boys. Hundreds of his servants were for ever scurrying into every corner of the planet to seek information and specimens; and the significance of their errands was by now often quite beyond the range of their own intelligence. They were careful, however, not to let their ignorance appear to the public. On the contrary, they succeeded in gaining much prestige from the mere mysteriousness of their errands.
The great brain was wholly lacking in all normal instinctive responses, save curiosity and constructiveness. Instinctive fear he knew not, though of course he was capable of cold caution in any circumstances which threatened to damage him and hinder his passionate research. Anger he knew not, but only an adamantine firmness in the face of opposition. Normal hunger and thirst he knew not, but only an experience of faintness when his blood was not properly supplied with nutriment. Sex was wholly absent from his mentality. Instinctive tenderness and instinctive group-feeling were not possible to him, for he was without the bowels of mercy. The heroic devotion of his most intimate servants called forth no gratitude, but only cold approval.