Hi Stewart
Did you have Archibald in 1841? It looks as if this might be him with his father. His mother had, possibly died.
Port Charlotte, Kilchoman
Parish 540 ED 6 P 18
McLean
Alexander, 55, Tenant
Archibald, 25, Tailor
Mary, 20
Isabella, 15
Donald, 55
All b. Argyll
Note on the 1841, ages of those of 15 and over were usually rounded down into 5 year age bands. Thus 55 = 55-59, 25 = 25-29, etc.
Gadget