Great pic Moi!
I've got a sizeable collection of glass plate negatives and one of them is a group of lighthorseman posing in front of the sphinx which is my favorite.
Also in the collection are pics of the Harbour bridge construction, billiard champion Walter lindrum, Artisit Albert namatjira and a collection of turn of the century pics of Sydney street life.
If anyone would like to see some I'd be happy to post them. I'm still in the process of deciding what to do with them but apparently they are quite valuable. They were passed on to me by my late cousin who was a world renowned photographer. I also have some of his own collection but they are not negatives, like an early family portrait of Arnold Schwarzenegger before he became really famous, The beatles in concert, Audrey Hepburn candids (He was a good friend of Audrey's and played tennis with her) and many more..