Billy Skelton was mentioned by Robert Crawley as not allowing hunting on his land. The Skeltons were also said to be mad by Mary Crawley and presumably are associated with Skelton Park mentioned in episode 1.01, which already had electricity in the kitchens, and the Skelton Estate mentioned in episode 1.05. Skelton Park and the Estate was still around in 1925, but whether Billy was still in charge is unknown.


Mary: "Families like ours are always hunting families."
Robert: "Not always. Billy Skelton won't have them on his land."
Mary: "But all the Skeltons are mad."
— Episode 1.02