The fourth stamp I agree with No1, at first glance the first thing to pop was Sydney. Ha, I love it. Okay, here is my take - partial leaf fancy, but for the life of me short of a favor from a friend, I can't fathom the partial. Here is a great example taken from Stamp Auction Network Michael Rogers Online, a Division of Daniel F. Kelleher Auctions
Second one looks like a crude negative cross. All in all wonderful cancels.