Cassan records a similar case.

According to Rayer, a woman by the name of Perat, summoned before the Chamber of Peers to give evidence in the trial of the assassin Louvel, was so much affected that her hair became entirely white in a single night Byron makes mention of this peculiar anomaly in the opening stanzas of the "Prisoner of Chillon:"-- "My hair is gray, but not with years, Nor grew it white In a single night.

As men's have grown from sudden fears." The commentators say that Byron had reference to Ludovico Sforza and others.

The fact of the change is asserted of Marie Antoinette, the wife of Louis XVI, though in not quite so short a period, grief and not fear being the cause.

Ziemssen cites Landois' case of a compositor of thirty-four who was admitted to a hospital July 9th with symptoms of delirium tremens; until improvement began to set in (July 13th) he was continually tormented by terrifying pictures of the imagination.