Peter, I don't know him. I'd have to check to see who's name goes on those abandoment markers. I'm fairly sure the information on them is a legal requirement by the various state's petroleum regulations. It could be a simple tradition of the welder adding his name to it, or more likely it's the name of an authorised person attesting to the closure of the well. That possibly could be someone from the drilling company OD&E which was based in Toowoomba, or someone from Innamincka Petroleum, or if they used a contractor to seal the well, someone from that company. Schlumberger and Halliburton were the main well services contractors out there.