Publisher's Synopsis
Reasonably enough the idiom is extremely troublesome to the child-mind. "The doctor says my mother has one foot in the grave," wrote a little girl the other day in a Composition Exercise. "That is not true. She has both feet in bed!" Again, if people will talk about "going it bald-headed," or about being "stony-hearted" or "iron-fisted" or "brazen-faced," and so on, they must naturally expect young children to accept the phraseology in its literal sense. Hence amusing misconceptions. Again, as I say, it is often a question of not having quite got the right word.