The second set contains, one essay on a Disjunctive True Propositions, addressed to Gorgippides; four on a Conjunctive True Proposition, also addressed to Gorgippides; one called, the Sect, addressed to Gorgippides; one on the argument of Consequents; one on questions touched upon in the three preceding treatises, and now re-examined, this also is addressed to Gorgippides; one on what is Possible, addressed to Clitus; one on the treatise of Philo, on Signification; one on what it is that Falsehood consists in. The third set contains, two treatises on Imperative Propositions; two on Interrogation; four on Examination; an epitome of the subject of Interrogation and Examination; four treatises on Answer; an abridgment on Answer; two essays on Investigation. The fourth set contains ten books on Categorems, addressed to Metrodorus; one treatise on what is Direct and Indirect, addressed to Philarchus; one on Conjunctions, addressed to Apollonides; four on Categorems, addressed to Pasylus. The fifth set contains, one treatise on the Five Cases; one on Things defined according to the Subject; two on Enunciation, addressed to Stesagoras; two on Appellative Nouns. The next class of his writings refers to rules of Logic, with reference to words, and speech which consists of words. The first set of these contains, six treatises on Singular and Plural Enunciations; five on Words, addressed to Sosigenes and Alexander; four on the Inequality of Words, addressed to Dion; three on the Sorites which refer to Words; one on Solecisms in the Use of Words, addressed to Dionysius; one entitled Discourses, contrary to Customs; one entitled Diction, and addressed to Dionysius. The second set contains, five treatises on the Elements of Speech and of Phrases; four on the Arrangement of Phrases; three on the Arrangement, and on the Elements of Phrases, addressed to Philip; one on the Elements of Discourse, addressed to Nicias; one on Correlatives. The third set contains, two treatises against those who do not admit Division; four on Ambiguous Expressions, addressed to Apollos; one, Ambiguity in Modes; two on the Ambiguous Use of Figures, in Conjunctive Propositions; two on the essay on Ambiguous Expressions, by Panthoides; five on the Introduction to the Ambiguous Expressions; one, being an abridgment of the Ambiguous Expressions, addressed to Epicrates; and a collection of instances to serve as an Introduction to the Ambiguous Expressions, in two books. The next class is on the subject of that part of logic which is conversant about reasonings and modes.