I've found this reference to a marriage (not saying its the one that everyone has been looking for but it is interesting with regards to a Swansea/Cardiff link)
Jun 1886
John Llewelyn DAVIES & Mary KELLY
Swansea 11a 1009
This does not fit in with generally accepted timelines for MJK but is a possible.
Jun 1886
John Llewelyn DAVIES & Mary KELLY
Swansea 11a 1009
This does not fit in with generally accepted timelines for MJK but is a possible.