I showed that the blind will to function in a certain way, and the impulse to seek the means of functioning in a certain way, must arise, provided that these two conditions are present in an individual, and that his body is in a sufficiently tonic state for these conditions to operate normally. Now in a woman the blind will to function as a mother finds its source in:— (_a_) The long line of female ancestors who _must_ have been mothers, and who therefore have established an ancestral maternal habit on the female side, which reaches the individual female with a considerable amount of accumulated momentum through the generations that have preceded her. (_b_) A certain correlation of bodily parts—the large amount of space taken up in the female body by the organs connected directly or indirectly with procreation, the importance of these organs, and the elaborate nervous organization contrived to bring these organs into effective and harmonious action when once the proper start has been given. (1) In the unmarried woman, therefore, whose body is sufficiently healthy and tonic to act normally, there are two forces incessantly impelling her to the employment of her important reproductive organs, of both of which forces she may be and usually is, childishly unconscious: they are (_a_) her ancestral bias or habit, and (_b_) the correlation of her bodily parts. The more perfectly formed she is and the more healthy she is, the more importunate will these forces be, and the less inclined will they show themselves to be put off without a struggle. This woman or girl I shall call the positive spinster—that is to say, the type of unmarried female who says “Yea” emphatically to life, and whose tendency will always be to favour those opportunities, circumstances, and directions in her life which promise to lead her to motherhood and the normal functioning of her body. (2) In the unmarried woman, however, whose body is not sufficiently healthy or tonic to act normally, there are the same forces present, driving her to employ her reproductive organs; but the insistence of these forces not being very great, the drive is hardly felt, or not felt at all. The ancestral habit, although the same of course, speaks with a fainter voice, and the correlation of organs which are less tonic and less healthy perforce generates a less impetuous impulse. This woman or girl I shall call the negative spinster—that is to say, she is the type of unmarried female who either says “Nay” emphatically to life, and who will not hasten to seize opportunities that promise to lead to motherhood, or else she will be listless and apathetic about the whole matter, unconsciously so, and therefore consciously uninterested, unmoved by any of its aspects. These two types of spinsters will now be examined separately. (1) THE POSITIVE SPINSTER