...ucism [disbelief in spirits] can question them. Calef first attacked Mather in a series of letters, which were subsequently published in book form, as above stated. In these letters he exposed Mather 's credulity, and greatly irritated that really good man. Mather retorted by calling Calef a weaver turned minister. Calef tormented Mather more by other letters in the same vein, when the former, ...