Those who have a reasonable Internet link might be interested in the BBC Radio 4 program
"What Did Your Ancestors Do for a Living?" which talks about jobs in the 1901
census, with emphasis on Wales and SW England. With RealPlayer (a free download) you can
listen to the 30 min program.
It is mainly Bristol with an introductory section on south Wales coalmining, the south
Wales content narrated by a Welshman.
http://www.bbc.co.uk/radio4/progs/listenagain.shtml
and scroll down to "What Did Your Ancestors Do for a Living?"
Cheers,
Malcolm