Bolter and Garstone of Herefordshire

Looking for info on family of Bolter. Lived in Abbeydore, Herefordshire between 1820's up to about 1880. 1881 census has them living (minus father) in Beaufort, Breconshire. They lived in the same house for 50 odd years. A cottage Llanwerin or Blackbush cottage, Abbeydore. Any info would be appreaciated. Father's name John born in 1820's married Hannah GARSTONE of Hereford town in 1849. She was born 1829ish. Daughter of Cabinet maker James Garstone. No info found, he is said to have died before they married. John Bolter's father was also a John, and his father was a William. Prior to around 1786 there is no mention of a William and Mary his wife other that the baptism entry for their son. Where did they come from? Any info appreciated.