Maybe not a folk song but it has been folk processed. Here is Earl McDonald's version recorded in the 1920's, staring both Bill and Casey.

CASEY BILL

Now, down the river came Steamboat Bill,
Spied Casey Jones coming over the hill.
The engine was a-puffin' and the boiler was hot
While the folks on board done the turkey trot.

The railroad run down 'longside the bank.
Casey crawled out from behind the tank.
Bill said to Casey, "You're a racing man.
Get up your steam and go as fast as you can."

Casey 'n' Bill, down the Mississippi,
Casey 'n' Bill, all full of glee,
Casey 'n' Bill, down the Mississippi,
Tryin' to break the record of the Robert E. Lee.

Now down the river about a mile below
Was the place where they had to go.
They both were running neck and neck.
When they reached the bridge gonna be a wreck.

So Casey reached up. The whistle he blew.
The drawbridge opened to let him through.
They both come together and they both must die,
'Cause the race was over and it was a tie.

Now in the wreck it was a shame.
There was no one that knew their names.
When the wives got the message their husbands was dead,
They both raised the river with the tears they shed.

The little kids didn't seem to bother
When someone told them that they lost their father.
One said to the other, "Now, don't cry and fret.
We don't need no daddy; ma's a suffragette."

And when they died, no one know.
Up to heaven is where they wanted to go.
St. Peter said, "Boys, you must relate
Something good you done to get through this gate."

Bill said, "I know at one time
We gave 20 cents to a man that was blind."
St. Peter said, "You know that don't go, Bill.
So you can take your 20 cents and go to Jeffersonville."