Not Watson, but a good answer.
The answer is Darbyshire
, on the Wodonga-Cudgewa line; and, David, you have indeed succeeded in trumping Valvegear.
George Christian Darbyshire was Engineer of the Melbourne and Mount Alexander Railway and then became Engineer in Engineer-in-Chief of the Victorian Railways. He then concentrated on surveying and ultimately became Surveyor-General of Victoria. When the aforementioned Robert Watson died unexpectedly, he returned to the position of Engineer in Engineer-in-Chief of the Victorian Railways. Amongst other things, he was a magistrate.
Your turn, David.