Does any know the history of Arnold NT?

Bullwaddy rest area is near Bullwaddy Conservation Reserve along the Carpentaria Highway. On-line maps show a locality of Arnold a little way south of the Highway near this point, with tracks running to it. There is a large treeless area south of the rest area which appears to have been cleared at some stage as trees line the road, and a few concrete foundations by the rest area. This is on a high point of the Highway, with a line of trees indicating a water course heading south, and Arnold is shown along this water course. I note there is an Arnold River which rises to the north of the Highway and heads north in the vicinity. Anyone know the history of the area? What were the buildings and when were they there?

Motherhen