Oh, and there's some bending in the verses.

When snow transforms the hedgerow thorn
C    F    G    A   F    Bb   A    G

And frost engilds the berry

C    F    G   A   c Bb A

Good men and true the firelogs hew

c    d   Bb   Bb   d c    Bb A

And in the inns make merry

A    G   A   G   F    E C

When singing all as with one voice

C    F   G    A   F   Bb   A   H

It seems the very walls rejoice

C    F   G    A c Bb   A c

And merriment about does spring

c    d Bb Bb d c   Bb    A

When all men sing

A    Bb   G   F