He said he has sightings for her after she gained her pardon and the last instance was a conviction for being drunk, I think in 1831. I am still awaiting info as to exactly where she fits into his tree and more to the point, how he proved it.
When I have the answers I will post again but he is away on holiday for a couple of weeks.
The marriage is interesting and possible and I have passed this on - with a suggestion he joins Rootschat!!
Many thanks for your interest.