Hello Elaine,
Hope this is the right family. (transcription)
1841 Scotland Census. Methven East Half, Methven Perthshire.
William McLaren 45 Carpenter.
Mary " 40.
David " 14.
Jean " 12.
Lilias " 10.
Mary " 4.
William " 1.
Alexander Brown 35 Carpenter J. (Journeyman)
James Stevenson 17 Carpenter Ap. (Apprentice)
All born Perthshire.
1841 Census: Adult ages rounded down to nearest 5, so William could be any age between 45 & 49yrs.
Regards, Dod.
P.S. Will have a look for John later this afternoon.