I have tried to list the chords from Molly Bawn that I am sure is the tune for Garry Owen. It's a fairly lively tempo: 6/8

         D                                     D
  I can hear those Sioux bucks singing, Sgt. Flynn.
         D                                  D
  I can hear those tom-toms ringing, Sgt. Flynn.
         D                      A7
  I can hear those Sioux bucks singing,
         G                   D
  I can hear those tom-toms ringing,
            D                  A7          D
  But they don't yet know the tune to Gary Owen.

The notes are as follows: Full notes underlined, half notes in upper case and quarter notes in lower case. Does this make sense?

  Oh come listen to my story Molly Bawn
  D   e    f  F   F  f   F e  d  F  A-----    

For I'm bound for death or glory Molly Bawn
  F  g    A     a   G    a    B a  f  A  C-----    

For I've listed in the army
  A  a     D  d  d    e c  C c    

Where no more your eyes can harm me
   c    B  b    b    B    c   b    A    

For they'd kill me while they charm me molly Bawn.
  D    f     A    a   A#    a    C    b  g  E  D---

Lord, I hope this works.

Slainte
JimmyC