Queensland State Archives posted a photo:
Blackall is a small town and rural locality in Central West Queensland. The dominant industry in the area is grazing. Blackall claims to be the home of the original Black Stump, which marks the original Astro Station established in 1887. Places west of this point are said to be ‘beyond the black stump’.
The region was explored in 1846 by explorer Sir Thomas Mitchell and his party. Blackall was named by Surveyor Abraham H. May after Sir Samuel Blackall, the second Governor of Queensland. During the 1860s the town developed as a service centre for the surrounding pastoral properties.
Blackall was one of the first Queensland towns to sink an artesian bore in 1885, which now supplies the town with water from the Great Artesian Basin. The water temperature is 58 degrees Celsius. There is an artesian spa bath at the aquatic centre and locally produced