The type of woman who really counts in our modern civilization is, as a rule, not of age until she is nearly thirty. Not only does she _not_ mature sooner than a boy; she matures actually later than a large number of men. I have now accumulated a wide and varied amount of evidence in favour of the view which I here propound, namely, that there is a most highly evolved type of woman in our midst. This type, which it will be agreed is the most valuable we possess, encompasses women of a wide range of potentialities; they have beautiful entirely feminine bodies, with all feminine and womanly instincts well developed, with a normal, indeed a rather strong, sex instinct and acute personal desires which tend to be concentrated on one man and one man alone. I will provisionally call this the late maturing type, for such a woman is generally incapable of real sex experience till she is about twenty-seven or thirty. I think that she is in line with the highest branch of our evolution, that she represents the present flower of human development, and that through her and her children the human race has the best hope of evolving on to still higher planes--but, and this is very important, she is not fitted for marriage until she is at least twenty-seven, probably later, her best child-bearing years may be after she is thirty-five, and her most brilliant and gifted children are likely to be born when she is about forty. Personal evidence, and also facts in the interesting letters sent me by my readers have brought to my knowledge the existence of an important proportion of women who are absolutely unconscious of personal localized sex feeling until they are nearly or over thirty--one woman was nearly fifty before she felt and knew the real meaning of sex union though many years married. From outward observation of the general physique of such of these women as I have seen face to face, I may say that, as a rule, they retain their youth long; they retain also a buoyancy and vitality which, if they are properly treated, and have the good fortune to be married at the right time to the right man, may remain with them almost throughout their lives. Such women not only prolong their girlhood, they defer their age. Such women have, of course, throughout the centuries appeared from time to time, and I fancy have generally in the past, and still often in the present, suffered acutely through marrying too young. When they marry too young they tend, by the forcing of their feelings, by the deadening through habit of their potentialities, by the trampling on the unfolded possibilities within them, to be turned artificially into a “cold type of woman.”