Professor Morgan, in several articles in the _Harvard Studies in Classical Philology_, and in the _Proceedings of the American Academy_, all of which have been reprinted in a volume of _Addresses and Essays_ (New York, 1909), upheld the now generally accepted view that Vitruvius wrote in the time of Augustus, and furnished conclusive evidence that nothing in his language is inconsistent with this view.

In revising the translation, I met with one bit of evidence for a date before the end of the reign of Nero which I have never seen adduced.

In viii, 3, 21, the kingdom of Cottius is mentioned, the name depending, it is true, on an emendation, but one which has been universally accepted since it was first proposed in 1513.

The kingdom of Cottius was made into a Roman province by Nero (cf.

Suetonius, _Nero_, 18), and it is inconceivable that any Roman writer subsequently referred to it as a kingdom.
It does seem necessary to add a few words about the literary merits of Vitruvius in this treatise, and about Professor Morgan's views as to the general principles to be followed in the translation.
Vitruvius was not a great literary personage, ambitious as he was to appear in that character.