Sentence:  Friday, 30th December, Hanson Range....Changed our course to a very prominent hill (which I have named Mount Arthur) bearing 275 degrees, and after crossing two small <WSD>myall</WSD> creeks and a stony plain with salt bush and grass, at ten miles we struck a large <WSD>myall</WSD> and gum creek, coming from the north-west, with some very deep channels. 
Meaning of the word marked with <WSD> tags:  Any of various Australian acacias, especially the (weeping myall), (noshow=1), or the wood of such trees.