Of Nominatives and Oblique Cases, addressed to Phylarchus, one book. Of Hypothetical Syllogisms, addressed to Apollonides, one book. A Work, addressed to Pasylus, on Predicates, four books. Fifth series : Of the Five Cases, one book. Of Enunciations classified according to subject matter, one book. Of Modification of Significance, addressed to Stesagoras, two books. Of Proper Nouns, two books. III. Logic, as concerned with Mords or phrases and the sentence. First series : Of Singular and Plural Expressions, six books. On Single Words, addressed to Sosigenes and Alexander, five books. Of Anomalous Words or Phrases, addressed to Dion, four books. Of the Sorites Argument as applied to Uttered Words, three books. On Solecisms, one book. On Solecistic Sentences, addressed to Dionysius, one book. Sentences violating Ordinary Usage, one book. Diction, addressed to Dionysius, one book. Second series : Of the Elements of Speech and on Words Spoken, five books. Of the Arrangement of Words Spoken, four books.