Hi Martin,
Thanks for your message. This branch of my Waterman tree is quite distant so I'm not tracing the Warwick family, but I do appreciate the offer thank you.
This is the information I have which you might find helpful:
Elizabeth Warwick was the daughter of William Warwick and Mary Coban. Like you said, Elizabeth married William Waterman on 25th December 1806 in Farnham, Essex. They had 2 children that I know of, Charlotte Waterman born 1807 in Birchanger, Essex and Frances Waterman born 1808 in Birchanger, Essex. Both daughters moved to Salt Lake City so I would assume they were mormons?
Incase you are interested, William was born in 1788 and was the son of Ward Waterman and Martha Trott.
Kind regards, Kathy.