Hi Carole - To answer the questions - no idea!
I have a contact in Australia and Sarah appears on his tree. Unfortunately, at this period there is very little detail in the convict records.
So, in desperation, I posted the message in the hope that it could spur a response from someone who had maybe lost a Sarah Worrall - but I'm not holding out much hope!
I think it will probably remain a brick wall for some time.