Hi there Ruth and Welcome!
Do you think Margaret got married after 1871?? Where did all her siblings end up?......did the family move from the area? If you think she might have married there are a couple guesses from the 1881 Census that could be checked out as they are listed born Stow and have no noticeable children older than 10.........Have you seached ScotlandsPeople for a marriage for her already?
Margaret Scott married to a William Scott
Dwelling: Blainslie
Census Place: Melrose, Roxburgh, Scotland
Source: FHL Film 0224042 GRO Ref Volume 799 EnumDist 7 Page 12
Marr Age Sex Birthplace
William SCOTT U 76 M Melrose, Roxburgh, Scotland
Rel: Head
Occ: Retired Carpenter
William (Jnr.) SCOTT M 40 M Melrose, Roxburgh, Scotland
Rel: Nephew
Occ: Master Carpenter Employing 1 Man
Margaret SCOTT M 40 F Stow, Edinburgh, Scotland
Rel: Nephews Wife
Occ: Carpenters Wife
or Margaret Park....
Dwelling: Parkend
Census Place: Inveresk, Edinburgh, Scotland
Source: FHL Film 0224013 GRO Ref Volume 689 EnumDist 4 Page 37
Marr Age Sex Birthplace
Archd. PARK M 51 M Inveresk, Edinburgh, Scotland
Rel: Head
Occ: Laundry Lab
Margt. PARK M 40 F Stow, Edinburgh, Scotland
Rel: Wife
Occ: Laundress
Robina PARK 5 F Inveresk, Edinburgh, Scotland
Rel: Daur
Occ: Scholar
Euphemia PARK 4 F Inveresk, Edinburgh, Scotland
Rel: Daur
Occ: Scholar
Margt. PARK 2 F Inveresk, Edinburgh, Scotland
Rel: Daur
Lots of questions...few answers....

but hopefully we can find something!!
Best wishes
Jean
Ooops...just realized you only had her through 1861 census!!! I'll go back and look for other choices with children over the age of 10 too!!....stay tuned.............!
