After checking a bit, the reference to the "One Mo' Rounder Gone" being in print was to the 1911 version printed by Howard Odum in my post above.

The Ballad of Delia (Green) in the Bahamas 1929 is known more usually but incorrectly as Delia Holmes. In 1928 Robert Gordon, the first Archivist with the new Archive of American Folk Song at the Library of Congress, traced the origin back to Savannah, Georgia. The song first appeared in print in 1911 (published version by Odum) and was collected by Howard Odum between 1906 and 1908 in Newton Co. Georgia.

Azizi- There is some similarity to FORTY FOUR and Whitehouse Blues. Apparently when the doctor operaed on McKinley, he couldn't find the bullet. The operation to find and remove the bullet is what killed McKinley "not" the wound itself.