I'll see what I can find re Mann and send you a PM, Laura.
The Powerhouse doesn't have anything on its website; however, there will be a talk from a curator from the Royal Collection, so perhaps more information will be made available later. I hope that will include information from the Australian National Archives. That material does not appear to be digitised yet.
--Previous Message-- : Hi Nellie and Beth : : I am curious to know what information the : Powerhouse Museum has on the brooch. : : I also wonder if any of Joseph Mann's : jewellery has been sold at auction and been : identified thanks to his unique mark. : : Laura : : --Previous Message-- : : Thank you Laura for keeping on hunting and : getting that detail. : I wonder if the Powerhouse Museum has it : all. : : I was imnpressed by the three large : diamonds. : : : --Previous Message-- : Thank you Nellie and LauraM for the very : interesting links. I was surprised to read : that the three diamonds at the centre of the : ti-tree flowers are each 5 carats. They : would make the brooch dazzling to see. : : : : :