Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
And yet at a slightly earlier date iussi which we write with a double s was spelt with only one. Further optimnus maximus, which older writers spelt with a u, appear for the first time with an i (such at any rate is the tradition) in an inscription of Gaius Caesar. [*](Caligula, the first of the Caesars to adopt this title.)
We now write here, but I still find in manuscripts of the old comic poets phrases such as heri ad me uenit, [*]( Ter. Phorm. 36. ) and the same spelling is found in letters of Augustus written or corrected by his own hand.
Again did not Cato the censor spell dicam and faciam as dicem
I learn from Pedianus that Livy, whose precedent he himself adopted, used this spelling: to-day we make these words end with an i.
What shall I say of uorlices, uorsus and the like, which Scipio Africanus is said to have been the first to spell with an e?
My own teachers spelt seruus and ceruus with a uo, in order that the repetition of the vowel might not lead to the coalescence and confusion of the two sounds: to-day however we write these words with a double u on the principle which I have already stated: neither spelling however exactly expresses the pronunciation. It was not without reason that Claudius introduced the Aeolic digamma to represent this sound. [*](cp. I. iv. 8.) It is a distinct improvement that to-day we spell cui as I have written it: