B. G. Jefferis and J. L. Nichols, Searchlights on Health — The Care of the Hair (1919)
“ THE COLOR OF THE HAIR.—The color of the hair corresponds with that of the skin—being dark or black, with a dark complexion, and red or yellow with a fair skin. When a white skin is seen in conjunction with black hair, as among the women of Syria and Barbary, the apparent exception arises from protection from the sun's rays, and opposite colors are often found among people of one prevailing feature. Thus red-haired Jews are not uncommon, though the nation in general have dark complexion and hair. ”
