Hey yeah texts 2a and 2b have a lot of change like the rulers and measuring things show that priorities have changed from the aboriginal way to surveying the land, the predominatly white people, the aboriginal people in the back of text 2b are faded out and grey as if not important. another thing that may help is the fakeness of the animals in 2a like how the european dog gets along with the native wallaby animal. Dunno if this helps but there you go!! good luck!!