REGIONAL SURVEY OF HATFIELD BROAD OAK. 193 Hatfield to the west of Hertford.4 In the map, Hatfield Broad Oak is marked, so that its position on the high ground between Stort and Roding is clearly seen. The bird's-eye view is drawn to show the area covered by the map, and on it Hatfield Forest, in the north of Hatfield Broad Oak parish, is marked. Hatfield Forest (like Epping and Hainault Forests) is open to the public for ever through the good offices of the Buxton family. These woodlands are all remnants of the great Forest of Essex to which kings came for sport and in which the people pastured their cattle and cut timber for fuel. In considering any region it is absolutely essential to consider external relationships to adjacent as well as to more distant parts. The district we are studying to-day has three outstanding relationships which have helped to mould its development, namely, the historic route-way of the Stort valley, the elevated cornlands of the Upper Roding country, and the great metro- politan area. Of these the first two have been functioning for centuries, whereas the last has become important only during the past hundred years. Our earliest ancestors used the rivers as a means of transport and established habitations along the valley-sides. The Lea- Stort line, providing a convenient south to north route, must have been important throughout the human history of southern Britain. Between Sawbridgeworth and Bishop's Stortford the valley is narrow, forming a kind of defile, which was crossed by the Roman Road from Colchester to Braughing on the Ermine Street. It is not surprising, therefore, to find evidences of pre-Roman settlement in this valley, and it is a simple matter to picture early man occupying vantage points along the valley between the forest and the river-marsh, points from which he could keep a look-out against potential enemies. Settlements doubtless existed where Bishop's Stortford and Sawbridge- worth stand to-day, on the western side, while midway between them, on the east, is Wallbury, an earthwork of considerable interest. Standing near Wallbury Encampment the church spires of Sawbridgeworth and Bishop's Stortford can be distinctly seen, calling to mind the three fortress castles of the Meuse gorge in Belgium—Dinant, Crevecceur, and Poilvache. Their relative position is much the same. 4. Such a map is published by Bacon & Co. at 1d.