Hello, I have been researching my father's family for around five years. His great great grandfather was James Logan who died 11 July 1858 @ 11 Millerston, Paisley, age 68. He was married to Jean Bolton - born Ireland (1809-1858). His grandfather-father was Alexander born 1855, however I can find no trace of his birth certificate in Scotland, likewise for his siblings Charlotte/Charlet, James, David, and Mary (all shown on 1851 census in Paisley). I thought perhaps, they were all born during his army service or in Ireland. As to the mystery of the Logan's in East Linton, I have always known there were cousins there and have inherited photos taken there. I visited the grave of David Logan/Helen Bryson yesterday, and I believe from his birth cert, that his mother may have been a mistress of James Logan, and why there is no mother mentioned on his death cert. As to who Margaret Sommerville was, it's mystery? Happy to dig around even more into this Logan family.
Lenna.