Thanks for confirming what I was thinking - I've searched tinternet extensively for him under various name combinations etc but without any trace at all. This seemed odd seeing as it seems to my admittedly inexperienced eyes that most of not all the convict ships are very well documented on the many and various free access sites "down under". I saw several Wm Vaughans but none so late as this one.
Ditto I tried the Ancestry free search page without luck.

??