Marje: I disagree with you about arpeggios on melodeon. I think Soldiers Joy is a very very hard tune for a beginner on the melodeon, just because of those root chord arpeggios. Yes they are superficially easy to play, because there is no in-and-out on the bellows. But for that reason, you lose all the rhythmic impetus which is the gift of the melodeon to the beginner. I know many a quite accomplished melodeon player who can't get much lift out of Soldiers Joy for that very reason. Whereas the in and out of the first couple of bars of Davy Davy Nick Nack is guaranteed to come out bouncy on a melodeon, just because the fast note runs involve single steps, not arpeggios.