Pemberton (Nightshade)

Mr Pemberton was a resident of Crook Marsham. He worked at the local post office and had never been more than thirty miles from there. He was one of the villagers consumed by the Sentience. (PROSE: Nightshade)

Behind the scenes
Pemberton is likely a reference to Victor Pemberton, one of Mark Gatiss' co-creators and co-stars in The League of Gentlemen, who Gatiss mentions in the afterword to PROSE: Nightshade.