Mary was born on February 26th, 1716 in Ardingly. Mary's father is John Elsey and her mother is Mary Pick. She was an only child. She died at the age of 72 on October 12th, 1788 in Henfield.
‌Mary and Stephen were married in a religious ceremony on December 27th, 1738 in Horsham. They had four sons and a daughter, named John, Stephen, Samuel, Samuel and Mary.