So, since as Q says of this class of work song, many were made up on the spur of the moment, in the absence of an authentic and complete version of the Shiny Silver Rails, I might as well imagine myself as a Gandy Dancer and write a few more verses, so we can sing the tune through more than once. Or revive the Celtic tradition where each person in turn has to improvise a verse, and if you stumble or hesitate, you're out,

The best preserved example I know of this type of song - improvised around the job and people you worked with - is the Old Chisolm Trail, which in my fake book has over 30 verses. I am sure people who work a little way from civilisation are still making them up as they go along. My father, a bush pilot, used to sing a song (tune: Reuben, Reuben) that had a personal verse for each of the pilots in his group of friends. His verse went something like:
    Val's got a brand new Fairchild monoplane,
    It's as light as thistledown,
    You can even make the wings flap
    If you just jump up and down!

Tony