I just listened to The Tenneva Ramblers' recording of IF I DIE A RAILROAD MAN, via Spotify. It's on CD "D" in the various-artists 4-CD set "Worried Blues," but I figure it must ultimately come from the same original 78-rpm recording that both 12-stringer and Jonathan Hewlett transcribed above.

The only point where the two transcriptions differ is verse 1, line 2, and I must say I agree with 12-stringer, not Mr. Hewlett.

By the way, I figure "Cuby" is a dialectical or local pronunciation of "Cuba" and probably refers to one of the American towns named after the island in the Caribbean. There are towns named Cuba in Alabama, California, Illinois, Indiana, Kansas, Kentucky, Missouri, New Mexico, New York, and West Virginia.