I know the Leadbelly version, very famous, in fact knew it before ever hearing the Prickle-Eye (hollie, whatever) refrain. His version was also covered by Led Zeppelin.
Nobody was saying the transcript in the link WAS American, I want to know about the modern reworking from '65.

Azizi, do you have the the lyrics to that version of the Elf Knight?
And does it feature the blasted budgie?