Hi Susan,
Here's your family in the 1881 Cencus:
Dwelling: Crossgreen Cottage
Census Place: Uphall, Linlithgow, Scotland
Source: FHL Film 0203709 GRO Ref Volume 672 EnumDist 5 Page 26
Angus NICOLSON, Married, Age 40, Birthplace: Sleet, Inverness, Scotland
Rel: Head
Occ: Farm Servant
Margaret NICOLSON, Married, Age 36, Birthplace: Kirknewton, Edinburgh, Scotland
Rel: Wife
Angus NICOLSON, Unmarried, Age 13, Birthplace: Kirkliston, Linlithgow, Scotland
Rel: Son
Occ: Drapers Apprentice
David NICOLSON, Unmarried, Age 11, Birthplace: Dunse, Berwick, Scotland
Rel: Son
Occ: Scholar
Margaret NICOLSON, Age 8, Birthplace: Dalmeny, Linlithgow, Scotland
Rel: Daur
Occ: Scholar
Mary NICOLSON, Age 5, Birthplace: Uphall, Linlithgow, Scotland
Rel: Daur
Occ: Scholar
Robert MC DONALD ?, Unmarried, Age 21, Birthplace: Ireland
Rel: Boarder
Occ: Shale Miner
Robert SIBBALD, Unmarried, Age 19, Birthplace: Dunfermline, Fife, Scotland
Rel: Boarder
Occ: Labourer Oil Works
John HENDERSON, Unmarried, Age 21, Birthplace: Boness, Linlithgow, Scotland
Rel: Boarder
Occ: Stone Mason
Hope this helps
Anne