 An important figure in the history of syllogistic logic is Richard of Campsall (c. 1280/90–1350/60). Sometime before 1308 he wrote his Questions on the Books of the Prior Analytics (Questiones super librum Priorum Analeticorum), a commentary on the first book of the Prior Analytics that devotes 14 of its 20 questions to modal syllogistic. He seems to think that there is nothing to add to the theory of assertoric syllogistic and his presentation of it is fairly standard, but he has lots of interesting things to say about modal syllogistic. 