Well actually it's bark from the paperbark tree. The strange patterns looks like it comes from a bug chewing its way around among some of the layers of bark, but I'm not totally sure of that. To me it looked like some alien language.
Speaking of bark, Jake felt so much better today he barked himself silly at a Pomeranian that we encountered on the walk this morning. Quite embarrassing really as he was truly like a madman or I should say a mad dog.
We had to make a quick exit, but secretly I was pleased that he was well enough to get that hot under the collar about a little scrap of a dog not much bigger than a large rat :)