Ya hoo, got them in 1851

1851 Census
HO107/2413/126/6
Fawdon,Gosforth, Northumberland
John GORDON, 29, head, mar, ag lab, born Ireland
Margaret, 29, wife, mar, born Ireland
Peter, 5, son, born Ireland
Bridget, 2, daug, born Ireland
William, 1 month, born Fawdon, Northumberland
Arent you you incredibly lucky

Just arrived in England to have William and appear on census

Peter appears to have stayed unmarried and appears with Mother Margaret on censuses up til 1901. Margaret is 80 in 1901.
Trish