And later, the Antonine wall a bit further north. Though, it's probably more accurate to say the walls were built to reduce the costs of Pictish raids. I doub

And later, the Antonine wall a bit further north. Though, it's probably more accurate to say the walls were built to reduce the costs of Pictish raids. I doubt the governor in Londinium woke in a cold sweat fearing Pictish invasion, even prior to Hadrian's wall being built.