"Human beings," the article begins, "differ not only in the knowledge they have acquired, but in their dower of intelligence or natural ability. It has long been accepted that the former property may continue to increase until the natural faculties begin to abate, but that the latter has a maximum for each individual, attained early in life.... Intelligence, as opposed to knowledge, is fully developed before the age of schooling is over. Sixteen years has usually been taken as the age at which, even in those best endowed, the limit of intelligence has been reached. Obviously the standard varies in different individuals; the degree of intelligence passed through by the more fortunate at the age of ten may be the final attainment of others, and all intermediate stages occur.... Mr H. H. Goddard, an American psychologist of international repute, classifies the intelligence of his countrymen into seven grades, but believes that in exceptional cases, amounting to four and a half per cent. of the population, a superlative standard is reached at the age of nineteen. On the other hand, seventy per cent. of the citizens of the United States have to carry on their lives with the intelligence of children of fourteen, and ten per cent. with that of children of ten." It was to hear these conclusions of Mr Goddard's expounded by a fellow-savant that I had come that afternoon to the Society of Arts. To tell the truth, a certain whimsical humour in the idea had attracted me. When a man's books sell as well as mine do, and he is as flatteringly thought of as I am, it is rather tickling to be told that he is really an infant of sixteen or seventeen, telling fairy-stories to a gigantic public nursery the average age of which is perhaps twelve. Sir George Coverham, Knight, merely the top boy of a kindergarten of adults!... It pleased me, and I rather hoped the lecturer would approach his subject from that humorous angle. The lights were being turned down as I entered the lecture chamber. Quietly, not to make a disturbance, I tiptoed to the nearest seat. Then, as with a preliminary hiss or two the shaft of light from the lantern pierced the gloom, I was able dimly to distinguish that the subject of the lecture had not attracted more than a couple of dozen people. These barely filled the first two rows. The rest of the theatre appeared to be empty. Of the speaker himself nothing could be seen but a glimpse of white beard as he moved slightly at the reading-lamp. He read from a typescript in a flat, monotonous voice, with once in a while a halting explanatory remark that trailed, paused, and then stopped altogether. I watched the acute angles his wand made with its own shadow on the diagrams projected by the lantern.