 The First Cohort of Frisiavones were also present at Brocolitia, one of Hadrian's wall forts and settlements, at Carrawburgh, Northumberland.Evidence for this relies on an inscription on an altar stone, which tells us that Optio Maus (an NCO within the Cohort) had repaid a vow to the goddess Coventina.Whether this altar was the repayment of the vow is unknown.