In the beginning of January, 1819, her head became covered with a kind of black wool over those places that were first denuded, and light brown hair began to develop from the rest of the scalp.

Some of this fell out again when it had grown from three to four inches; the rest changed color at different distances from its end and grew of a chestnut color from the roots.

The hair, half black, half chestnut, had a very singular appearance.
Alibert and Beigel relate cases of women with blond hair which all came off after a severe fever (typhus in one case), and when it grew again it was quite black.

Alibert also saw a young man who lost his brown hair after an illness, and after restoration it became red.

According to Crocker, in an idiotic girl of epileptic type (in an asylum at Edinburgh), with alternating phases of stupidity and excitement, the hair in the stupid phase was blond and in the excited condition red.
The change of color took place in the course of two or three days, beginning first at the free ends, and remaining of the same tint for seven or eight days.