Hi
Thats interesting!
I can't place Ellis Mansfield's connection to Isabella yet. What I have worked out is that Ralph Dutton the Lord of the Manor (Timsbury) spoke in Parliament in 1867 regarding the Simla Court Marshall see the link below
http://hansard.millbanksystems.com/commons/1867/aug/06/motion-for-an-addressHe stated that he was related to Sir William Mansfield who was involved in the court marshall. William Mansfield was a General who was commander in chief of India.
The following I got from Wikipedia. Sir William Mansfield was the fifth of seven sons of John Mansfield who lived at Digwell or Digswell House.Isabella was the daughter of John Mansfield making them siblings. Which makes Sir William, Ralph Dutton's brother in law.