This story has now become a work of fiction!
I don't know if the person who created this query is still using this site, but if they are or if anyone is interested, I have some news!
Mary Broad/Bryant's life story has been adapted into a fictional story, by the author "Lesley Pearse" and it's available from most retailers, especially online. The name of the book is "Remember Me". I am at present reading it myself and Lesley has adapted the story from information that she has researched herself. So far I am enjoying the book and it is quite captivating, in the fact of the hardships that the first fleet had to endure on the arrival in Australia. From what I am reading (and some of it is based on truth) it is a miracle that Mary didn't die along with many others of malnutrition.
I am enjoying the book so much, that I thought I would investigate her further. And the first thing I found was this thread.
If you are mildly interested in Mary Broad, I would definitely recommend this book as a mild incite into her life. Whether it be fact, mild or complete fiction. I believe it is based on fact!
Enjoy!
Natterjack