Wernal (pronounced Wunnel) is the local name for the rural Bucks village of Worminghall,  near the Bernwode Forest, where Henry VIII used to hunt.  
 
In his book 'Farmer Giles of Ham' JRR Tolkein suggests that the 'worm' element of the name derives from the dragon in his story.   
 
Click here for Daniel Nistico's haunting performance on YouTube. 
 
This is a piece suitable for Grade 3/4 players.  Although it may look complicated in places, most shifts are simple chord shapes moved around the fretboard.