Hi Andrew. Good to hear from you. Please email me on firstname.lastname@example.org. I think you are missing two siblings who might have died early-Drummond and Margaret Allan.Margaret Lambert came after Margaret Allan, which would suggest this is so. It was nice to discover that my grandmother was known as Aunt Nellie. I remember Aunt Jessie (from Thurso) in my childhood.My grandmother died a little before my fourth birthday.
I could send you a gedcom-file with all my information and I have a glass-negative of my my g-mother as a baby on her father Robert's knee.