Here are some resources to inspire your writing:

http://members.iinet.net.au/~perthdps/convicts/

 

A Short History of Convict Australia

http://www.schoolatoz.nsw.edu.au/homework-and-study/other-subjects-and-projects/history/convicts-in-australia

http://sydneylivingmuseums.com.au/stories/day-life-convict

http://australia.mrdonn.org/convicts.html