Thanks judb, funny how something can be right under your nose and you don't even think about it.
I'm going to go with The Ellen convict that came to Australia for the 1839 crimes. I have a theory, I don't know how accurate it is. Having came across this info but. I'm under the distinct impression that Ellen married Benjamin and William is his brother, there are 2 possible William madras's from the area that would be of an appropriate age to be transported.. Benjamin and ellen had a child Richard maddrah who died as an infant. 1839.Ellen Mather I believe is the index
Now, I can not find what happened to William madderah after his pardon in 1836, I have been searching non stop.