and Étretat, are on the coast. Dieppe, is towards the margin of the region, lying as it does on the same geological fault as formed the Pays de Bray. This fault gave rise to the deep harbour which the Northmen found when they arrived. (The Swedish for deep is djup.) The towns on the plateau are generally small. Of these, the larger, such as Yvetot, Bolbec and Lillebonne are towards the south, on the Rouen-Le Havre axis. The site of Le Havre was once part of the Pays de Caux but the town has developed into an entity with a separate nature. The population density of the Pays de Caux is a little above the French average. Its traditional industries are fisheries, on the coast, and flax growing and weaving, on the plateau. Once hostilities between the Normans and the French had been settled with Paris, the estuarine ports to the south developed trade up-river towards Rouen. In more recent times, urbanization has spread from Le Havre and, more recently still, from the new industrial polder in the Seine Estuary. The plateau's exposure to the winds of the sea may account for one of the features of the rural architecture of the region: the plain, unadorned farmhouses in farmsteads, typically enclosed by high earth banks, walls, and a sheltering square of trees. (see also Architecture of Normandy). Neighbouring natural regions Pays de Bray to the East Vexin normand to the South-east Lower Seine valley to the South History Independent Gaul Julius Caesar’s account of his military campaigns (Bellum Gallicum, The Gallic War) gives details of the Caletes, partly ancestors of the Cauchois (see Book II, 4, 9, ; Book VII, 75, 3–4, Book VIII, 7, 4) Roman Gaul Rescue archaeology undertaken on the line of the A29 autoroute revealed several Gallo-Roman villas. One of the most important is that of Sainte-Marguerite-sur-Mer, on the coast to the west of Dieppe. The archaeologists found a complex of several rooms, organised around a square court. Several of the rooms had been furnished with mosaics. To the north, the baths and other rooms were heated by hypocausts. The materials used were pisé (clay and grit well mixed and rammed down to form a wall), cob (a similar mixture of earth of a buttery consistency or marl, chopped straw and perhaps gravel) and timber framing, typical materials of Normandy’s later building tradition. Lillebonne is on