Hi Bobi.com,
Great that you've established the marriage between Mary Ann ( or Marian, as it's transcribed on the BMD site) Rowe/ Kelly and John Milne. Poor souls only married a year before John's death then?
Have you ordered a transcription of this marriage? With a bit of luck that would give you John's parents names and therefore a route back to Scotland.
It's interesting the couple only married after many years together and several children together - although I believe ' living together without benefit of a certificate' , as my late granny would have put it was a lot more common than my granny's generation would have believed!

Could it be that John was already married and his wife still alive ? Certainly Mary Ann was free to marry after Rowe's death in 1869

. Wonder what held them back till they were both in their 50's?
Looby

Oh and sorry that the probate was not related. I realised the location was on the wrong island but thought I'd mention it anyway. Cos with family history....you never know!!