Institutio Oratoria

Having stated the rules which we must follow in speaking, I will now proceed to lay down the rules which must be observed when we write. Such rules are called orthography by the Greeks; let us style it the science of writing correctly. This science does not consist merely in the knowledge of the letters composing each syllable (such a study is beneath the dignity of a teacher of grammar), but, in my opinion, develops all its subtlety in connexion with doubtful points.