It is impossible to get the symptoms and wants of a child except by interpreting its motions. An astute observer one who has been watching children for a number of years will understand the child and will hardly have to ask the mother a question. He will know at once where the child is sick by what it does. The child is like the animal. You never have to ask a horse or dog where he feels pain because he will always tell by his motion. So does the infant.