Recognising the fact of different remuneration for the same amount of work, we have next to consider the causes. It is evident that the sort of explanation offered by Adam Smith for difference of wages in different employments will not avail much in the case with which we are dealing. The lower remuneration of women is not brought about by way of compensation for the greater "agreeableness" or other pleasurable incident or perquisite of their tasks. Possibly we might refer to this head, as well as to others, the circumstance that women having in prospect the hopes of domestic life are likely to take less interest in their trade than men do who cast in their lot for life, if this difference in future prospects is attended with a difference in the effort of attention given to work in the present. But doubtless the explanation is to be found chiefly not in compensation produced by the levelling action of competition, but in the absence of competition between men and women--in the existence of monopoly whether natural or artificial, to use Mill's distinction (_Political Economy_, Vol. II. Chapter XIV.), together with custom and what Mill calls "the unintended effect of general social regulations." A natural monopoly is constituted by the superior strength of man, the occasional exercise of which, as just noticed, entitles him to some superiority of pay for work which at first sight may appear almost identical with that of women. The experience recorded in the following pages does not afford any expectation that this kind of superiority tends to vanish. "There is an almost unanimous chorus of opinion that women's work as compositors is so inferior to men's that it does not pay in the long run" (Chapter IV.). Speaking of the physiological differences between men and women in relation to their work, the Editor concludes that "when all false emphasis and exaggeration have been removed a considerable residuum of difference must remain." Custom and the somewhat capricious sense of decorum counts for more than might have been expected in restricting women to certain industries, and accordingly, on the principle emphasised by Mrs. Fawcett, depressing their wages. "I know my place, and I'm not going to take men's work from them," said a female operative to an employer who wanted her to varnish books (Chapter IV.). "Why, that is men's work, and we shouldn't think of doing it," was the answer given by forewomen and others to the question why they did not turn their hands to simple and easy processes which were being done by men (Chapter V.).