The Etruscans, then, appear in general as an industrious people ( φιλότεχνον ἔθνος), of a bold and lofty spirit of enterprise, which was greatly favoured by their priestly aristocratic constitution. Massive walls, mostly of irregular blocks, surround their cities (not merely their acropoleis); the art of protecting the country from inundations by the construction of canals, and outlets from lakes, was very zealously practised by them.