Sentence:  The principle which governs the providing of <WSD>Dressing-rooms</WSD> seems to be this. ... Then comes the case of one <WSD>Dressing-room</WSD>, by which it may be said the gentleman's toilet is taken out of the lady's way, she retaining the Bed-room; and this admits of the attendance of a lady's-maid. Then follows the case of two <WSD>Dressing-rooms</WSD>, which in its simplest form supposes the lady not to give up the use of the Bedroom for dressing, but to make use of the inner retiring-room for washing. 
Meaning of the word marked with <WSD> tags:  A small room adjoining a domestic bedroom where people may dress or undress in privacy.