Hi,
The early Electoral Rolls have a couple of persons, William Abbott residing in the Blackall area for many years, there was a William looks like married to Bridget residing in Woodbine St Blackall for a long time but your William was not married.
There was however another William Abbott in the Blackall area as well and he first qualified to be on the Queensland State Electoral Roll in 1893 residing at Malvern Hills which is a homestead out from Blackall, his occupation was labourer. William Abbott is still residing at Malvern Hills in 1919 as a Station hand/labourer.
1922, 1925, 1930, 1934, 1936 and 1937 has a William Abbott, a Station Hand at nearby Lowanna Benlidi out from Blackall.
This William Abbott may have been your man, in Australian terms Blackall is in the same vicinity as Winton and it doesn't appear that there was a Mrs Abbot at these two resisiding places with William. This William was employed as a labourer/station hand.
Regards
Gerry