About twenty years later, when the frontier was pushed further north and the Antonine Wall built, the first stone fort was erected under the Governor Quintus Lollius Urbicus.

Bishop and Dore's report on the excavations at Corbridge 1947–80 reveal the complex history of the sequence of mainly earth and timber forts which preceded the masonry buildings.

[5](available here) The reports also cover a metal hoard found within the fort, possibly linked to the abandonment between AD 122 and 138[6] (also available on the Archaeology Data Service website).

A series of probable temples were erected, followed by granaries, a fountain house and a large courtyard complex, which may have been intended to become a civilian forum or a military storehouse and workshop establishment.

[4] Burnt timber buildings may relate to Cassius Dio's reference to tribes crossing the frontier but by the early 3rd century there was more construction.

Coria was probably a big market centre for the lead, iron and coal industries in the area, as well as agriculture, evidenced by the granaries.

The first excavations were carried out in 1861 by a Mr Coulson but the plans, reports and drawings were lost and only a summary of his findings published in Archaeologica Aeliana.

[6][11] Work on Hexham Abbey in Northumberland in 1881 brought to light a Roman funerary monument in the stonework of the south porch of the transept.

The ala Petriana is known to have been stationed at Corbridge, and the slab is thought to date to the late first century and to have once stood in the military cemetery near the fort there.