While those of the high lands and the Batavians distinguished themselves by a long-continued course of military service or servitude, those of the plains improved by degrees their social condition, and fitted themselves for a place in civilized Europe.

The former received from Rome great marks of favor in exchange for their freedom.
The latter, rejecting the honors and distinctions lavished on their neighbors, secured their national independence, by trusting to their industry alone for all the advantages they gradually acquired.
Were the means of protecting themselves and their country from the inundations of the sea known and practiced by these ancient inhabitants of the coast?
or did they occupy only those elevated points of land which stood out like islands in the middle of the floods?
These questions are among the most important presented by their history; since it was the victorious struggle of man against the ocean that fixed the extent and form of the country.
It appears almost certain that in the time of Caesar they did not labor at the construction of dikes, but that they began to be raised during the obscurity of the following century; for the remains of ancient towns are even now discovered in places at present overflowed by the sea.

These ruins often bring to light traces of Roman construction, and Latin inscriptions in honor of the Menapian divinities.

It is, then, certain that they had learned to imitate those who ruled in the neighboring countries: a result by no means surprising; for even England, the mart of their commerce, and the nation with which they had the most constant intercourse, was at that period occupied by the Romans.

But the nature of their country repulsed so effectually every attempt at foreign domination that the conquerors of the world left them unmolested, and established arsenals and formed communications with Great Britain only at Boulogne and in the island of the Batavians near Leyden.
This isolation formed in itself a powerful and perfect barrier between the inhabitants of the plain and those of the high grounds.
The first held firm to their primitive customs and their ancient language; the second finished by speaking Latin, and borrowing all the manners and usages of Italy.