No scale! No photo of teeth! And apparently not collected! What can I say? It appears not to be Antechinus or Sminthopsis, so in that location could be House Mouse (Mus domesticus), Bush Rat (Rattus fuscipes), Black Rat (Rattus rattus), Broad-toothed Mastacomys (Mastacomys fuscus), or Rakali (Hydromys chrysogaster).