I would imagine that Catherine would have to be baptised in the Roman Catholic faith before she could marry in a Roman Catholic church.
Not necessarily. Do you have the parish marriage record? Did it have any extra notation on it?
I have a selection of RC parish marriages. Sometimes its marked as a 'mixed marriage' and there may have been a dispensation from the bishop to say it was ok to marry - the main requirement was that the non RC spouse would agree that any children would be brought up as RC.
From what I have read, here in the UK the one thing that all different flavours of religion agreed upon was that 'baptism' can only happen once no matter what religion your parents had you baptised into, you can't be 'baptised' twice.
I have seen adult baptisms into the RC church marked as 'sub conditione' - which roughly translates into 'the person can't show one way or another if they have ever been baptised therefore they are received into the church', but if already baptised elsewhere its not an actual baptism but shows they have been recieved into the congregation as a member of that faith - if that makes sense.
My husband's G Grandmother, was baptised as C of E. She married a catholic (in a registrar's office). This puzzled me greatly as, according to her grand-daughter, G Granny was more Catholic than the Pope :-) No adult 'baptism' has been found for her, no RC confirmation has been found. All of her children were baptised as RC and she had a full requiem mass at her funeral (which indicates she 'was' Catholic.)
These things are rarely straightforward.
Boo