hi

1841 census(freeCEN) would seem to match some of the info. you have -
brae head farm W L , st ninians , stirlingshire
james kemp 45 ag. lab. born outside census county
mrs kemp 43 b. O.C.C.
margaret kemp 11 b. stirlingshire
william kemp 9 b. stirlingshire
james kemp 7 b. stirlingshire
john kemp 4 b. stirlingshire
peter kemp 1 b. stirlingshire
children of james kemp and janet kay(IGI)(all baptized st ninians stirling)
jane kemp 1825
william kay kemp 1832
james kemp 1835
john kemp 1837
peter kemp 1839
daniel kemp 1841
also found this -
http://worldconnect.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=doigk&id=I51607ev