William
I am being a little too trigger happy, sorry - You are correct that Rosina was born 1896:
Name: Rosina Margaret Smith NB Recorded as Smith not SMYTH - Could be transcriber error?
Registration district: Downpatrick
Record type: BIRTHS
Registration date - quarter and year: Jan - Mar 1896
Volume: 1
Page: 535
Collection: Ireland, Civil Registration Indexes 1845-1958
Have you looked at the UK Census?
Slan Go Foill
Marc