After some hesitation she admitted that she had found that it was possible to slant the book so it caught light from the hall, where we always left a nightlight burning. My husband, who used to read at night when he was a boy with a flashlight under the covers, said that inadequate light was harmful to the eyes. I, who used to read at night when I was a girl by the street light outside my window, said that little girls who stayed awake reading at night were very apt to be sleepy in school the next day.