17, II), the Hernici in the Trerus valley, Satricum and Glanica in the Pomptine marshes.
At Forum Appii it entered the Pomptine Marshes; that this portion (19 m.
Of the Pomptine Marshes.
The presence of the former was due to the fact that it was the starting-point of a canal which ran parallel to the road through the Pomptine Marshes, and was used instead of it at the time of Strabo and Horace (see APPIA, VIA).
Its position, at the point where the Volscian Hills reach the coast, leaving no space for passage between them and the sea, commanding the Pomptine Marshes (urbs pron g in paludes, as Livy calls it) and possessing a small harbour, was one of great strategic importance; and it thus appears very early in Roman history.
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