Watch the Emneth online guitar lesson by Adrian Legg from Fingerstyle Revisionist: Adagio Songbook

This is the section where I get carried away, I hear it the way that this was originally arranged - for organ, among other MIDI instruments. Since we've only got a guitar here, we have to try to recreate the other instruments the best we can.

You can get away with a bit of sloppiness in the treble, with the big octave in the bass keeping the part together.