Carrawburgh

Carrawburgh is a settlement in Northumberland, England, United Kingdom. It was the site of an auxiliary fort on Hadrian's Wall called Brocolitia, Procolita, or Brocolita. This name is probably based on the Celtic name for the place, and one possible translation put forward is 'badger holes'. The fort there was a mile or so west of the Wall's northernmost point at Limestone Corner, and just over a mile west of the nearest milecastle, Milecastle 30. The fort either used the Wall (narrow gauge on a broad base at this point) itself as its northern rampart, or was built parallel to it but detached. It certainly postdates both the Wall and the vallum (which it is built across).

Carrawburgh in "Merchants of Discord"

Quintus Vestinus Corvus, the first decurion of Brocolitia, was tasked with solving the murder of the merchant Secundinius, one of a group of merchants who traveled along the Wall.