It comes to my mind that memorable piece of black music that is "Sixteen Tons". Here are some verses:

If ya hear me a-comin' ya better step aside
A lotta men din't an' a lotta men died
With one fist of iron an' the other of steel
If the right one don' getcha then the left one will.

I was born one mornin' when the sun didn't shine
Picked up my shovel and I went to the mine
Loaded sixteen tons of number nine coal
And the strawboss said, "Well, Bless my soul!"

And, how old is this song ? Always the same story...
Yours, Andrés Magré