The line of comfort may be followed in its growth like the line of safety. At first anything to keep the wind and rain off was comfortable--any snug hole to help retain the heat of the little animal. Then that old ABC of all later luxury, the bed, appeared--something soft between you and the rock--something dry between you and the ground. So on and on, as ease grew exquisite and skill increased, till we robbed the eider duck and stripped the goose to make down-heaps for our tender flesh to lie on, and so to the costly modern mattress. The ground, the stamped clay floor, the floor of brick, of stone, of wood; the rushes and the sand; the rug--a mere hide once and now the woven miracle of years of labour in the East, or gaudy carpet of the West--so runs that line of growth. Always the simple beginning, and its natural development under the laws of progress to more and more refinement and profusion. Always the essential changes that follow changed conditions, and always the downward pull of inviolate home-tradition, to hold back evolution when it could. See it in furnishing: A stone or block of wood to sit on, a hide to lie on, a shelf to put the food on. See that block of wood change under your eyes and crawl up history on its forthcoming legs--a stool, a chair, a sofa, a settee, and now the endless ranks of sittable furniture wherewith we fill the home to keep ourselves from the floor withal. And these be-stuffed, be-springed, and upholstered till it would seem as if all humanity were newly whipped. It is much more tiresome to stand than to walk. If you are confined at home you cannot walk much--therefore you must sit--especially if your task be a stationary one. So, to the home-bound woman came much sitting, and much sitting called for ever softer seats, and to the wholly home-bound harem women even sitting is too strenuous; there you find cushions and more cushions and eternal lying down. A long way this from the strong bones, hard muscles, and free movement of the sturdy squaw, and yet a sure product of evolution with certain modifications of religious and social thought. Our homes, thanks to other ideas and habits, are not thus ultra-cushioned; our women can still sit up, most of the time, preferring a stuffed chair. And among the more normal working classes, still largely and blessedly predominant, neither the sitting nor the stuffing is so evident. A woman who does the work in an ordinary home seldom sits down, and when she does any chair feels good. In decoration this long and varied evolution is clearly and prominently visible, both in normal growth, in natural excess, and in utterly abnormal variations. So large a field of study is this that it will be given separate consideration in the chapter on Domestic Art.