Hi Barry , what you have to remember is that the 1841 census , ages were rounded. Children up to 15 would be exact , over 15 ages were rounded down , quote " someone aged 24 would be listed as 20 , 27 would be 25. However as Thomas Clucas appears to have died February 1843 aged 72 and the census was June 1841 , he may have been 71 , Margaret could have been as much as 54.
I will have a look at your line to see what I think , but with your names Margaret and Thomas , and surnames Clucas, Cowley, Callow and Moore , they are as common as Smith in England.
One thing I can assure you of is that Margaret Callow , wife of Thomas Cowley , does have the parents Robert Callow and Margaret Qua(y)ne , she is named in their wills of 1808 when they died.. They appear to have 4 living daughters and no sons. Margaret Quayne Callow was shown as 77 and Robert Callow was 67.
Will keep looking for you
Cheers
David Dwyer