Institutio Oratoria

Now such a practice will be an actual hindrance to those who are learning to read. This difficulty occurs in Greek as

well in connexion with the addition of an iota, which is employed not merely in the termination of the dative, but is sometimes found in the middle of words as in λῄστης, for the reason that the analysis applied by etymology shows the word to be a trisyllable [*]( The noun being formed from ληίζω. ΛΗΙΣΤΗΙ in the text is dative after in. The trisyllable to which Q. refers is the nominative. ) and requires the addition of that letter. The diphthong ae now written with an e, was pronounced in old days as ai;