It's all in muted downstrokes until each chord change.  It's an open down up then down on 
each new chord.  Then right back to muted downstrokes.


[Intro]

            (x2)


[Verse 1]

            
And under the 

        
boughs unbound
            
All clothed in

           
 a snowy shrou

d
            
She had no hea

          
rt so hardened
            
All under the 

        
boughs unbound


[Interlude]

            (x2)


[Verse 2]

            
Each feather i

           
t fell from sk

in
            
Till threadbar

        
e she grew thi

n
             
How were my ey

          
es so blinded
            
Each feather i

           
t fell from sk

in


[Refrain]

             
And I will han

             
g my head, han

           
g my head low
             
And I will han

             
g my head, han

           
g my head low


[Interlude]

            (x2)


[Verse 3]

            
A gray sky, a 

       
bitter sting
            
A rain cloud, 

           
a crane on win

g
            
All out beyond

           
 horizons ohhh

hhhhh
            
A gray sky, a 

       
bitter sting


[Refrain]

             
And I will han

             
g my head, han

           
g my head low 

(x6)


[Outro]

            (x2)

             (x2)