Source: The Sibley Family in America, Vol 1, by James Scarborough Sibley.
"After several children in the town of Salem had severe pains due to tortures of demons and could not answer when asked, 'Who is torturing you?' despite the entreaties of local and other clergy, the people became agitated.
One of the Reverend Parris' neighbors, Goody Mary Sibley (Mary Woodrow Sibley), who had knowledge of demonology which had been handed down in her family for generations, remembered a procedure which would empower an afflicted child to name the wizard or witch who was doing the torturing. Goody Sibley performed the rite without the knowledge of Reverend Parris. 'Make a cake of rye meal mixed with the children's water and put it in the hot ashes on the hearth. When it is baked, give it to the dog. If he eats, the children will name the torturer.' After all was done Goody Sibley came near being tried as a witch but was finally let off with a severe chastisement after she had confessed the error of her ways. The children did name their 'torturer', but that is another story."