This would be Captain Robert Alexander Llittle, DSO & Bar, DSC. He flew with the Royal Naval Air Service from 1916 until his death in May 1918. His score stands at 47 victories, the highest-scoring Australian pilot of WWI.
He was killed while flying at night on 27 May, 1918. He took off in the dark to try to intercept some Gotha bombers, and was shot through both thighs with one bullet. It was never learned if the bullet came from a Gotha's gunner or from anti-aircraft ground fire, but he crash-landed his plane and bled to death before being found the next morning. He also suffered a fractured skull and ankle in the crash.