A cursory glance at the digital archive reveals one reference to a soccer player named Quilp, playing for the Reliance team from Dinmore in 1904. Confusingly, it suggests the Quilp was sent off for backchat and then subsequently scored the winning goal that was to become the subject of a protest.
Quilp began talking to the referee and was ordered off the field. The game now was very fast and Hunter was playing well is also was Roberts and Salisbury. Verrol in goal as per usual was very clever in clearing his goal line. The Reliance got away, and Quilp had a shot at goal. To the spectators it did not seem as though they scored, but the referee gave a goal to Reliance, who were now 1 to nil. No further goals were scored, and at call of time a protest with regard to the above goal was lodged. The Brisbane Courier Monday 30 May 1904 p 6It is possible that this is the first recorded goal by a senior Aboriginal player in Australian soccer, though it's also possible that as a forward (winger) he scored a few before that.
It's a mystery that is just begging to be explained. More to come!