I have no idea what is going on here. Olde Times humor? Is it a drawing? Regardless, Rottnest Monster is a new one to me.
Note: The Mirror was a weekly broadsheet newspaper published from 1921 until 1956. It was the “scandal sheet” of its day, dealing with divorce cases and scandals.

WHEN THE SECRETARY of the Rottnest Board of Control (Mr- S. J. Hay ward) saw this strange object in a city street, he thought at first sight It was the Rottnest monster, or a pup thereof. However, at a second glance, he discovered it was a length of copper wire, bent and twisted into all sorts of queer shapes while it lay under the wheels of traffic.
Sources & Links