Took some photos of the (partial) skull and pelvis. Didn’t want to deglove it for a better look as I, ironically enough, didn’t have gloves. Skull was about the size of an otter or baby harbor seal, which are my best (very uneducated) guesses.
Found these remains in an old blanket in the canyon
A quokka skull I'm quessing? Found on Rottnest.