Wrap Me Up in My Tarpaulin Jacket in Sandburg is similar to Old Rosin the Beau in Randolph, vol. 4, Ozark Folk Songs. In turn this is similar to Old Moll Roe in Randolph ed. Legman in Roll Me in Your Arms. How similar is similar and where do you cut?

First line:
I live for the good of the nation (ending high)- Randolph, Rosin...
Wrap me up in my tarpaulin jacket (rising, but not as high)- Sandburg, Tarpaulin Jacket.
I met old Moll Roe in the mornin' (ending high)- Randolph-Legman.

2nd line:
My sons they are all growing low (ending low)- Randolph, Rosin.
And say a poor buffer lies low, lies low (ending low)- Sandburg, Tarpaulin
Her tail was all drabbled in blood (ending low)- R-L

3-4 lines:
Third lines end high, 4th lines start high, then drop low in all three songs.

Haven't seen Ives. Randolph-Legman, commenting on Old Moll Roe, says "Tune identified as "Tarpaulin Jacket" or "Rosin the Beau" by J. S. Manifold."
Music for "The Old Settler," first two lines, is similar to Sandburg's Tarpaulin Jacket. It is identified as "Rosin the Beau." (Lingenfelter and Dwyer).

Where do you make the cut? Sounds to me like some do and some don't separate the tunes. How much variance is "allowed"?