Thank you, Monica, much appreciated!
All we know of this lady is she was Mrs. Marjorie Jane Scott, from Musselbrough - she owned property in Levenhall, Musselbrough. She died when my mother was 11, so details are sketchy. Her first husband died in WWI - (his body was never returned, the story went he was hit by a mortar in a foxhole).
Her nephew (the only person mentioned in her will, except for my grandfather and mother) was Herbert Brown - when I found an article about a WWI memorial dedication in Musselbrough, with Alex J Scott on it, and an organist Herbert Brown playing at the ceremony, I took a leap of faith! I could be way off base.
Mrs. Marjorie Jane Scott married Theodore George Dixon (previously married in 1915 to Dora Florence Wilson Ridley, she died around 1921), around 1922, and she died around 1927. They lived in Monkseaton, Whitley Bay (north of Newcastle).
I can find my grandfather's first marriage, in Newcastle-Upon-Tyne, on lds.org - he may have married Mrs. Scott in Scotland.
TGD is buried with his first wife and my mother in Whitley Bay - Mrs. Scott (by then Marjorie Jane Dixon) may have been buried in her hometown.
Not much to go on, I'm afraid.
My great-nephew had a school project on genealogy, and my oldest brother wondered if I had any info on the mysterious Mrs. Scott who was in our family briefly - and who my mother barely remembered. Intriguing, I thought it might be worth a shot!
Much appreciated, anyway!