The fort at Halton Chesters was built across the line of the wall facing north, halfway between milecastles 21 and 22 about 0.5 miles (0.80 km) east of Dere Street.

A dedicatory slab from the west gate of the fort tells how the Sixth Legion were responsible for the initial building work but does not give the name of the original garrison.

It is likely, but not proven, that the Hadrianic unit was a cohors quingenaria equitata, an auxiliary force containing a nominal five-hundred men, approximately half of whom were mounted.

[3] The road passes by Great Whittington, then north-east to Hartburn, where just to the west it crosses the Hart Burn, a tributary of the River Wansbeck.

Near the village of Whittingham, there was a Roman fort at Learchild, from here a road headed west to meet Dere Street at Bremenium (High Rochester).

The Roman road then heads west by north, passing Newtown, Northumberland, before crossing the River Till just before Horton.