The stares were in the bricks and stones and mortar that comprised the manor itself. The blood of their makers, whose flesh was bought and sold to support such idyllic country houses, called to him.
So I thought this too because British slave trade, right? Except it turns out Britain never really did chattel slavery at home. They were a massive part of the slave trade, but slavery on the level of the US South was only in the colonies. And technically even that was abolished a good 30 years before the Civil War. I'm not actually sure what this dude is fighting for
