Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
To avoid all suspicion of quibbling, I will say that a solecism may occur in one word, but never in a word in isolation. There is, however, some controversy as to the number and nature of the different kinds of solecism. Those who have dealt with the subject most fully make a fourfold division, identical with that which is made in the case of barbarisms: solecisms are brought about by addition, for instance in phrases such as nam enim, de susum, in Alexandriam;
by omission, in phrases such as ambulo viam, Aegypto venio, or ne hoc fecit: and by transposition as in quoque ego, enim hoc voluit, aulem non habuit. [*](i.e. nam cannot he coupled with enim; de being a preposition cannot govern an adverb ( from above ); in is not required with Alexandriam, which is the name of a town. Quoque, enim and autem cannot come first in a sentence Ambulo per viam, ab Aegypto venio, ne hoc quidem fecit would be the correct Latin. ) Under this last head comes the question whether igitur can be placed first in a sentence: for I note that authors of the first rank disagree on this point, some of them frequently placing it in that position, others never.
Some distinguish these three classes of error from the solecism, styling addition a pleonasm, omission an ellipse, and transposition anastrophe: and they assert that if anastrophe is a solecism, hyperbaton might also be so called.
About substitution, that is when one word is used instead of another, there is no dispute. It is an error which we may detect in connexion with all the parts of speech, but most frequently in the verb, because it has greater variety
statesor
qualitiesif you prefer either of these terms), be these types of error six in number, as some assert, or eight as is insisted by others (for the number of the forms of solecism will depend on the number of subdivisions which you assign to the parts of speech of which we have just spoken). Further there are solecisms of number;
now Latin has two numbers, singular and plural, while Greek possesses a third, namely the dual. There have however been some who have given us a dual as well in words such as scripsere and legere, in which as a matter of fact the final syllable has been softened to avoid harshness, just as in old writers we find male merere for male mereris. Consequently what they assert to be a dual is concerned solely with this one class of termination, whereas in Greek it is found throughout the whole structure of the verb and in nouns as well, though even then it is but rarely used.