Abbott's lyrics appear in 'The Bolthole: A Novel of New Zealand' by Lawrence Winkler. You can read the lyrics at

https://books.google.ca/books?id=4UpWDwAAQBAJ&pg=PT88&lpg=PT88&dq=And+when+they+dance,+their+dresses+spin+%E2%80%98round+They+travel+so+light+that+they+ne%E2%80%99er+touch+the+ground&source=bl&ots=Ljstj8oUaC&sig=ACfU3U0V-jz83XlazadZvF4OqmBU1k6BiA&hl=en&sa=X&ved=2ahUKEwji_PKZyrTpAhV0lHIEHXyRC1UQ6AEwAHoECAkQAQ#v=onepage&q=And%20when%20they%20dance%2C%20their%20dresses%20spin%20%E2%80%98round%20They%20travel%20so%20light%20that%20they%20ne%E2%80%99er%20touch%20the%20ground&f=false

Some of the lyrics differ from those posted by Brooklyn Jay, but this time it's the writer of the song indulging in the folk process ;-)