It was anonymous.
Health or How To Live - 1865
THE FEET – The feet hold very important physiological and pathological relations. A wiser maxim for the preservation of health was never given than that which enjoins upon persons the necessity of keeping the head cool and feet warm. The latter is quite as important as the former. Indeed the circulation of the brain cannot be healthful, and perfectly carried on, unless the feet are kept warm.
It may be truly said that if the feet are kept entirely healthy, no organ in the body can be unhealthy. For so intimate is the sympathy between all parts of the body that no organ can be deranged without disturbing the circulation in the feet.
If there is indigestion after a hearty dinner the feet suffer; if there is pressure upon the lungs, or if the bowels are inactive, or if the kidneys do not perform their office properly, the feet are sure to feel the reactionary influence unhealthfully. So if one will be sure to keep his feet in an entire state of health, he may be certain that he cannot be sick in any department of his system.
But the feet of almost every grown person in this country suffer from abuses put directly upon them. Health reformers generally, give no such care to the feet as they deserve. They should be kept clean. They perspire more readily and freely than most other portions of the body, and the excreted matter ought to be removed by frequent washing.