By the Scheldt, the Eendracht, the Volkerak and the Hollandsch Diep, which separate it from Zealand and South Holland, N.
St Quentin (uniting Scheldt with Sonsme and Cisc) 58
The Gallo-Celtic tribes bore the general appellation of Belgae, and among these the Nervii, inhabiting the district between the Scheldt and the Sambre were at the date of Caesar's invasion, 57 B.C., the most warlike and important.
The strip of coast from the mouth of the Scheldt to that of the Ems remained, however, in the hands of the free Frisians (q.v.), in alliance with whom against the Franks were the Saxons, who, pressing forward from the east, had occupied a portion of the districts known later as Gelderland, Overyssel and Drente.
This middle kingdom formed a long strip stretching across Europe from the North Sea to Naples, and embraced the whole of the later Netherlands with the exception of the portion on the left bank of the Scheldt, which river was made the boundary of West Francia.