Darwin has a wall in the city (preserved from a pub, a long time since I've walked past) which has the signatures of the early aviators who passed through. Don't recall the names, but likely contenders possibly include Harry Hawker, Ross & Kieth Smith, Kingsford Smith, Amy Johnson. Must check.
Can't seem to imbed photo
https://www.flickr.com/photos/40132991@N07/5786728060