That's the problem, in a nutshell. Right there.
In 1861, 1871, and 1881 her birthplace is given as"Horton, Bucks". But in 1851 it was given as "Studley, Berks". My first question is "make your mind up woman, which county were you born in?" Then I found Horton cum Studley. But Berkshire has morphed into Oxfordshire with the county boundary changes so...I give up. I'm leaving it to the locals to figure out.