One hears of people whose hair turned white in a single night. Last night I thought mine was turning. I had a creepy feeling in the roots, which seemed to crawl all the way down inside each separate hair, wriggling as it went. I suppose you couldn’t have nervous prostration of the hair? I worried dreadfully, it kept on so long; and my hair is so fair it would be almost a temptation for it, in an emergency, to take the one short step from gold to silver. I didn’t dare switch on the light in the wagon-lit and peep at my pocket-book mirror (which reflects one’s features in sections of a square inch, giving the survey of one’s whole face quite a panorama effect) for fear I might wake up the Bull Dog.