Institutio Oratoria

He will not do this by way of censuring the poets for such peculiarities, for poets are usually the servants of their metres and are allowed such licence that faults are given other names when they occur in poetry: for we style them metaplasms, [*]( The formation of cases of nouns and tenses of verbs from a non-existent nom. or pres.: or more generally any change in the forms of a word. ) schematisms and schemata, [*](schematismus and schemata both seem to mean the same, sc. figures. ) as I have said, and make a virtue of necessity. Their aim will rather be to familiarise the pupil with the artifices of style and to stimulate his memory.