Under it the cost of the necessary land was to be found as to one-third by the state and as to the residue locally, but this arrangement proved unworkable and was abandoned in 1845, when it was settled that the state should provide the land and construct the earthworks and stations, the various companies which obtained concessions being left to make the permanent way, provide rolling stock and work the lines for certain periods.
Of the castle earthworks and fragments of walls remain.
Across the river from the town ancient earthworks (Bucton Castle), of British origin, are seen, and a Roman road passing them, and running north and south is also traceable.
The town is of high antiquity, and is partially surrounded by earthworks probably of British construction.
The earthworks, of British origin, were modified in almost every successive age.