Cape Breton coal mines
In 1978 when this NFB snapshot was made, Cape Breton coal mining was already being memorialised. But the song is jolly, full of optimism.
Canada Vignettes: Men of the Deeps, Cape Breton by Sandra Dudley, National Film Board of Canada
By 2009, this performance at the National Arts Centre in Ottawa, Cape Breton coal mining has become a tragedy.