Various designs were carved on the chest arms or back of the Kamilaroi boys years ago. These were known as ‘ mombarai ‘ or drawings that identified their family or clan. It is possible these simple designs could have been carved on trees as well ? Not randomly like graffiti but more like a message to others ? Communication by message stick or stone involved marks and symbols understood by many clans over large areas. Simple cuts could have been left on debarked trees as well showing where a certain group of people were headed. Tracks are very hard to follow after strong winds or a storm so these ‘drawings’ would last longer… even until now in some cases ?