I am also from this line. Thomas Glanville born in 1848 was also a son of James and Hannah Glanville. He appears with his family on the 1870 census as does your John and his wife Martha with one daughter Lillian. I am trying to find the name of James's father and mother and their national origin. One document that I saw said that the father was born in Scotland. I do know that Hannah was born in England