S & B conclude on the basis of these facts that, setting aside such issues as style and vocabulary, five possibilities suggest themselves: (i) DS is a collection gathered at Aristotle's behest for him to mine while composing his own book on weather signs" (p. 4); (ii) DS was written by Aristotle; (iii) DS was written by Theophrastus; (iv) DS is an abridgement of what either Aristotle or Theophras