there are two extracted records at Douglas St Mathews both 18110414 of children to Henry Nantes + Patty CLYNAH -
Henry Nantes had two earlier ch by Elizth Corlett (m Braddan 18001029) bur Douglas St Georges 18081207 (a child also died)+ an illeg ch by Ann Corlet
You can see the marriage entry on mormon film - the IGI gives the film number to order but I doubt if the entry will be that informative