He began to read again his technical works on the coal-mining industry, he studied the Government reports, and he read with care the latest things on mining and the chemistry of coal and of shale which were written in German. Of course the most valuable discoveries were kept secret as far as possible. But once you started a sort of research in the field of coal-mining, a study of methods and means, a study of byproducts and the chemical possibilities of coal, it was astounding, the ingenuity and the almost uncanny cleverness of the modern technical mind, as if really the devil himself had lent fiend’s wits to the technical scientists of industry. It was far more interesting than art, than literature, poor emotional half-witted stuff, was this technical science of industry. In this field, men were like gods, or demons, inspired to discoveries, and fighting to carry them out. In this activity, men were beyond any mental age calculable. But Clifford knew that when it did come to the emotional and human life, these self-made men were of a mental age of about thirteen, feeble boys. The discrepancy was enormous and appalling.