What is this sigil/coat of arms that I found in my backyard?? | AskHistorians Archive Observer

What is this sigil/coat of arms that I found in my backyard??

by Princesspuma

https://imgur.com/OjFkjAg

I live in Melbourne, Australia.

AngstyRaven

I found this but it lacks the third Fleur de Lis covered by the sash.

https://www.heraldsnet.org/saitou/parker/images/m267a.gif

https://www.heraldsnet.org/saitou/parker/Jpglossf.htm