454 THE HISTORY Rook 1. parting betwixt the fewer forts on the wider ifthmus of Cum- berland and Northumberland ; Hadrian conne&ed the latter by ja regular wall of turf ". And as the Brigantes or Britons after- wards pafled the forts betwixt the friths * and invaded Genou- nia, Ge-Nouania, the land of the Nouanei or Novantes ,3 , Lollius united the former by another wall of turf f Hadrian meant not by the one ere&ion to refign up the province of Va- lentia to the power of the Caledonians, any more than Severus meant it by rebuilding the wall of ftone 15 , when he was juft returning from or was juft advancing to the intended fubje&ion x>f all Caledonia. Hadrian meant not by the one ere&ion to re- iign up the province of Valentia to the enemy, any more than Lollius meant by the other to refign up the conquefts of Agri- cola in the country of the Horeftii, when he was a&ually pre- paring to reduce all the Caledonians, The walls were erefted to continue the chain unbroken from fort to fort, and to preclude the Caledonians from flipping by the forts and ravaging the country. They could no longer pafs by the forts upon the friths and the rivers. And if they croffed the friths in their veffels, they were liable to be attacked by the troops from the ftations, and they were effectually reftrained in their progrefs by the wall .betwixt the rivers. Valentia was constantly retained in the power of the Romans, Genounia being fubjedt to them at the period of the invafion and betwixt the conftru&ion of the_wall of Hadrian and the ere&ion of the vallum of Antoninus 26 . And the whole province remained under the dominion of the Romans to the days of Severus '% to the reign of Conftan- tine *% and to the final feceffion of the Romans from the ifland ,9 . But now when the Romans collected their forces to the nor- thern and eaftern border, and even many years before this pe- riod, in the time of Antonine's Itinerary, they appear not to have made the wall of Antoninus the principal barrier of the country, and to have lined it particularly with troops. The jeady paflagp and the cuftomary conveyance of the Pi&s and Scots