Hi Chiad
I don't think Frances Clarke is the lady we are looking for.
The marriage certificate for Francis Deborah Mary Jemima Beerclark (27 June 1864) states that she was 22 years old when she married. That would make a date of birth around 1842. The name on the certificate is Francis Deborah Mary Jemima Beer Clark but I am not sure who wrote the name.
I can send you a copy of the marriage certificate. Let me know if you want it.
Regards
Berlor