These may have been explained before, but I can't find them.

Meaning of "swamp angels" in the song State of Arkansas, as in the line - "Farewell to swamp angels, cane breaks and chills..."


And the use of "mourners" in There Was an Old Coot from Tennessee -
as in "I went to hear them mourners sing and pray..." - its some kind of group within a church.


I have a general sense of what these mean, but everytime I sing them I always wonder. Thanks.