Ah, pity that it’s just the song names listed here, as GBS tends to borrow liberally (and skillfully!) from instrumental trad. Their recording of "Lukey", for instance, has a copy of the Staten Island hornpipe (in G) squished in the middle; Billy Peddle is Soldier’s Joy (not in D, but I don’t know the key offhand).
I think "A Finnish Polka" is also a part of this set.
Not Billy Peddle
Wait, wait. I was wrong about that. I was just listening to some of their music and "A Finnish Polka" is actually part of the Fortune Set, not Billy Peddle - but BP has got a tune that sounds a little bit like it.