invasion, so any attempted reconstruction will be purely speculative. Urbicus may have campaigned against several British tribes (possibly including factions of the northern Brigantes), certainly against the lowland tribes of Scotland; the Votadini and the Selgovae of the Scottish Borders region, also the Damnonii of Strathclyde and the Novantae of Dumfries and Galloway. All three of the legions of Britain would have taken part (Legio II Augusta based at Caerleon, the Sixth Victrix based at York and the Twentieth Valeria Victrix based at Chester), as they are all mentioned on the inscriptions recording building work undertaken along the Antonine Wall. This legionary core was, no doubt, backed up by a substantial contingent of auxiliary units, of which we have record of around nine regiments (e.g. RIB 1276, 2140, 2142, 2149, 2155, 3509). It seems likely that Urbicus planned his campaign of attack from Corbridge in Northumberland, just to the rear of Hadrian's Wall, as dedicatory inscriptions positively dated to the early 140s have been uncovered at the Antonine storage-depot there. From here he drove north-north-west into the Scottish Borders along the Agricolan military road Dere Street, leaving garrison forts at High Rochester in Northumberland and possibly also at Newstead in the Borders, as he struck towards the Firth of Forth. Both of these sites, as well as similar military installations at Risingham, Chew Green, Cappuck and Inveresk, were very likely used as bases from which to police the lowland tribes, namely the Votadini to the east and the Selgovae to the west. Having secured an overland supply route for military personnel and equipment along Dere Street, Urbicus very likely set up a supply port at Carriden for the supply of grain and other foodstuffs before proceeding against the Dumnonii tribe in South Strathclyde. This done, then came the task of completing a new barrier of turf and timber stretching for thirty-five miles from east to west across the narrow neck of land separating the mighty Rivers Forth and Clyde, nowadays known as the Antonine Wall. Later career Urbicus returned to Rome with the prospect of the prestigious post of praefectus urbi (Prefect of Rome), which he probably held in AD 146, after the death of the incumbent, Sextus Erucius Clarus. He was perhaps the praefectus urbi who is known to have died in AD 160. One recorded activity of Urbicus while praefectus urbi was his presiding at the trial of