Hi Judith, I believe I am looking for the same Marsh family as you are.
I have Elizabeth Marsh,born 1819 South Molten married to William E.E. Webber. Elizabeth's parents were Henry Marsh born 1790 Highhampton Devon ,died 1853 South Molton Devon & Elizabeth nee Ruse Ruse born 1794 died 1851, St.Germans,Cornwall, England.
Elizabeth, 1794 parents were Elizabeth Wedlock 1769, & Benjamin Croker (Crocker) Ruse, 1765 Cornwall England.