Many of the persons convicted at Salem were found to have dolls in their possession, a piece of circumstantial evidence that in itself was almost sufficient to convict them. But there were other ways if determining whether a person was a witch or not. Witches were thought to have witch-marks on some part of their bodies, an area of skin that was red or blue or in some way different from the rest. Furthermore, at some time during a twenty-four-hour period, it was thought, the devil or one of his imps would visit the witch and be visible to observers. He might come in the shape of a man or a woman or a child, or a cat, dog, rat, toad--indeed, any kind of creature. The devil could take nearly any shape he chose. So the usual procedure against a person accused of witchcraft was to search his or her belongings for dolls, search his or her body for witch-marks, and then keep watch over the person in the middle of the room for twenty-four hours. God help anyone who had an old doll in his possession and in addition had some skin blemish.