[From NY 98726447 to NY 99066412.] It is possible to establish the extent of the medieval settlement at Corbridge. The ground slopes steeply to the river along the whole of the southern front. On the east and west sides water courses, that are fast being obliterated, run down into the Tyne. On the north side there is no natural boundary, the ground between the heads of the water courses is crossed by a depression which seems to have been a fosse protecting the town upon its most vulnerable side.

It there was ever a rampart behind the ditch all trace of it has been obliterated, the defensive works must have been slight at best; Corbridge was never a garrison town, it had no military organisation attached to it, and no castle - even in Norman times.

The town was probably delineated, fortified and transferred into a burgh in the late 10th to early 11th centuries. (1)

A noticeable 'crest' of land was seen crossing the Chains area of allotments, on a general east-west alignment. This could possibly be the location of the medieval town boundary. (2)