Good morning

,
I'm puzzled by your 1841 Census result for Thomas aged 4

This is the Freecen Transcription-
45 Broomland Street-
MORRISON James M 40 Brewer Renfrewshire
MORRISON Agness F 40 Renfrewshire
MORRISON James M 15 Joiner Apprentice Renfrewshire
MORRISON Janet F 12 Renfrewshire
MORRISON William M 10 Renfrewshire
MORRISON Mary Ann F 6 Renfrewshire
MORRISON Margaret F 6 Renfrewshire
MORRISON Thomas M 4 Renfrewshire
MORRISON Eliza F 1 Renfrewshire
There are no family relationships noted on the 1841 so although it is possible the youngsters could all be the children of James Morrison snr , there is always the chance that they are nephews/nieces or indeed grandchildren.
Alexander Morrison age 78 is also at 45 Broomland St but is not listed on same Freecen page.
I have tried to locate the above family on the 1851 Census without much luck. The elusive Morrisons strike again

Could be James snr and Agness had died.....or they all moved away .
Looby