A treatise of the sibyls : so highly celebrated, as well by the antient heathens, as the holy fathers of the church : giving an accompt of the names, and number of the sibyls, of their qualities, the form and matter of their verses : as also of the books now extant under their names, and the errours crept into Christian religion, from the impostures contained therein, particularly, concerning the state of the just, and unjust after death /