There is a version here, which (based on the notes following it) I think may be from the author himself:

http://media.smithsonianfolkways.org/liner_notes/fast_folk/FFSE105.pdf

That version is an image of a newsletter, but there is a typed out version of the same here:

http://www.marcogiunco.com/Testi/002511_05.htm

This version has:

"No young men to tend them, nor pastures to see"

Two other small differences:

"Are covering the downs" instead of "All covering the downs"

"Down from their green farmlands" instead of "Down from the green farmlands"