Thank you everyone for your feedback and insights as to how this marriage could have occurred. I am going to try to source more detailed information regarding the marriage. The idea that Henry married a Bristol girl and brought her back to the FOD does sound like a very good hunch. I have not had much luck sourcing MILLS in the FOD transcripts, so looking to Bristol will be my next step.

Should I learn anything interesting, I will definitely post a reply :)

Kind regards,
Rachel