Hi Deb USA (and others)
Your theory of Elizabeth Hammond and her husband Thomas Hannah visiting the Scott's in London is an interesting theory and I guess it is entirely possible. However, I have them in Stirlingshire, Scotland in the 1901 census:
29 Wallace Street, Grangemouth
Thomas Hannah, Head M 33, Railway Clerk, Stirlingshire, Bothkennar
Elizabeth Hannah, Wife M 31, Ireland
Georgina Hannah, Daughter 1
They had 2 further children - Annie McInnes Hannah born June 1901 and Thomas Hammond Hannah born April 1910. All 3 children were born in Stirlingshire.
We know that the Hammond's had lived in Dublin since at least 1868 as Mary Elizabeth Hammond was born there. Mary's sister was in the main Post Office there when the IRA took it over in the Easter rising of 1916. As Protestants they were unable to stay in Dublin and moved to Bangor. From there I believe that a few of them moved to England, although unfortunately I have no names etc.
As far as Capt Scott's wife is concerned I have her as Edith Agnes Kathleen Bruce, daughter of Lloyd Stewart Bruce and Jane Skene. I think that the 1878 birth that you found is most likely her.
I found 2 possible births for her father in the IGI:
Lloyd Stewart Bruce - International Genealogical Index
Gender: Male Birth: About 1840 Downhill, Londonderry, Ireland
Lloyd Stewart Bruce - International Genealogical Index
Gender: Male Birth: About 1837 Of, Inverurie, Aberdeen, Scotland
I think the Londonderry one is most likely. If so, then he was the son of James Robertson Bruce, born 04 Sep 1788 at Downhill, Londonderry - I have not yet identified the mother. This Bruce line can be traced right back to the family of Robert The Bruce King Of Scots and all the way back to the Kings of Upsalla in Sweden - a very impressive lineage indeed!!!!!!
If there is a link to my family then I imagine that it must be via one of the much poorer relations!
I don't know anything about Jane Skene other than her marriage to Lloyd Stewart Bruce. I wonder why her mother was in Greece at the time of her birth? It's all getting very interesting.
