Hi Jo, I suppose you have your Smiths in the 1881 Census? Here they are ( I think ) just in case.
Dwelling: Main Street, Old Kilpatrick.
SMITH Hugh, 47, Head, Gen. Lab. born Ireland
SMITH Elizabeth, 39, Wife, born Ireland
SMITH Hannah, 19, Daur, Mill Worker, born Ireland
SMITH Mary, 16, Daur, Mill Worker, born Duntocher
SMITH Hugh, 15, Son, Mill Worker, born Duntocher
SMITH John, 12, Son, Scholar, born Duntocher
SMITH Elizabeth, 4, Daur, born Duntocher