When the Weavers recorded this song, they used a lot of verses from Jay Gould's Daughter.
Don't know if it's traditional to sing it that way, or if the Weavers made it up.
-Joe-

Here's my transcription


ROCK ISLAND LINE
As recorded by The Weavers on "The Best of the Decca Years"

CHORUS: Oh, the Rock Island Line, it is a mighty good road.
Oh, the Rock Island Line, it is the road to ride.
The Rock Island Line, it is a mighty good road.
But if you want to ride, got to ride it like you find it,
Get your ticket at the station for the Rock Island Line.

1. Cloudy in the West, looks like rain
Bought me a ticket on the railroad train.
Pour on the water, shovel on the coal,
Stick your head out the window, see the drivers roll. CHORUS

2. The seven forty-five was always late,
But arrived today at a quarter to eight.
The engineer said when they cheered his name,
"We're right on time, but this is yesterday's train." CHORUS

3. The engineer said, before he died,
"There's two more drinks that I would like to try."
The conductor said, "What can they be?"
"A hot glass of water and a cold cup of tea." CHORUS

4. The eastbound train was on the westbound track,
The northbound train was on the southbound track;
The conductor hollered, "Now, ain't this fine,
What a peculiar way to run a railroad line." CHORUS


Other Weavers recordings of this song use the Leadbelly lyrics, with additional verses:

Little Evalina, sittin' in the shade,
Countin' all the money that the Weavers ain't made.

Jesus died to save our sins,
Glory to God, we're gonna need him again.

Little Evalina, sittin' in the sun,
Countin' all the Weavers, one by one by one.

Moses stood by the Red Sea shore,
Whackin' on the water with a two-by-four.