I am currently searching and contacting the harbour authorities in hope that I can set the record straight. The original theme was sparked by an historical blue plaque indicating that convicts were 'transported' to the nearby coast. The convicts mentioned are correct and were tried in the song location. many people enjoyed the song, however I am aware that folk audiences tend to be well read and educated. I've certainly learnt a lesson. Thanks to all supplied views. I can hopefully post a successful outcome soon.