My wife has also traced her maternal line back to Joseph Rayment(bapt.25th Nov 1804 in WestMill.)and Susanna(nee. Peters) from Great Munden, Herts. I am sure that Joseph's parents were John and Elizabeth Rayment of Layston Herts. Theline has come down through sons also called Joseph to her grandmother who was a Rayment. we have full details of that branch of the family if it is of interest to you.