Xth book of Pliny's Epistles. He mentions the following works, carried on at the expense of the cities. At Nicomedia, a new forum, an aqueduct, and a canal, left unfinished by a king; at Nice, a gymnasium, and a theatre which had already cost near ninety thousand pounds; baths at Prusa and Claudiopolis; and an aqueduct of sixteen miles in length for the use of Sinope.