we are also from sydney, i probably should let sarah fill you in on the information she has, however there is a book which i think is called 'Dripstone' whic has a lot of information pertaining to the cashel family, I presume you have visited the museum at wellington, if not, its worth a visit (has a photo of sarah cashel displayed) I beleive there is probably some information to be gleened from the cemetary at Stuart Town. Will get sarah to send you an email if you like, my email address is
cashela@dial1.net if you would prefer to use that rather than reply through the message board. jenny