This might be David and Elisabeth Blackwell in 1841 with son James and his wife and child:
Balmesh, Old Luce
David Blackwell, 70, farmer, b. Ireland
Elisabeth, 70
James, 25
Margt, 25
Elisabeth, 1
Agnes Rainey, 15, Female Servant
All but David born Wigtownshire
Note that ages were often rounded down into 5 year age bands in the 1841 - so 70 could be anything between 70 and 74, 25 anything between 25 and 29.