The Cloa'cae, or common sewers, attracted the wonder of the ancients themselves; the largest was completed by Tarquin the Proud.
The innermost vault of this astonishing structure forms a semicircle eighteen Roman palms wide, and as many high: this is inclosed in a second vault, and that again in a third, all formed of hewn blocks of pepenno, fixed together without cement.

So extensive were these channels, that in the reign of Augustus the city was subterraneously navigable.
22.

The public roads were little inferior to the aqueducts and Cloa'cae in utility and costliness; the chief was the Appian road from Rome to Brundu'sium; it extended three hundred and fifty miles, and was paved with huge squares through its entire length.

After the lapse of nineteen centuries many parts of it are still as perfect as when it was first made.
23.

The Appian road passed through the following towns; Ari'cia, Fo'rum Ap'pii, An'xur or Terraci'na, Fun'di, Mintur'nae, Sinue'ssa, Cap'ua, Can'dium, Beneven'tum, Equotu'ticum, Herdo'nia, Canu'sium, Ba'rium, and Brundu'sium.