Hi there
Right, if he was 21 in March 1844 he would have been 19 in March 1841 when the census was taken. And the only 19 year old Thomas Travis recorded

is from Liverpool, and occupation "jSmith" (Junior Smith?

) parents John and Susannah. John Travis is also a "smith". Whatever your records say I am absolutely certain that he was not originally from Wymondham
The occupation of bricklayer is a puzzle, but if my theory that this is connected with the building of the railway is correct, that project would have used both metal workers to lay the track and bricklayers to build the stations. So he may have, errr.. multi-tasked as we would now say. I'm not sure how much local labour was used, but if my memory is correct the railways were usually built by specialist gangs that travelled the country
The date of March 24th is very helpful, as the original court records should be available.He was probably tried in Norwich Assizes, quite a few people were transported from here, having been held in the old castle jail. Also there may well be some magistrates committal documents in our town archives.
Anyway, I'll try to find out more over the next few weeks, and I'll keep you posted