In The Zeitgeist Machine (1977), earlier publication of this story isn't acknowledged, however it is possible (the author died in 1967, 10 years before). The MUP Encyclopaedia of Australian Science Fiction & Fantasy only lists 1977 The Zeitgeist Machine.
This story does appear in the December 1969 issue of Australian Science fiction Review 21 (Scythrop 21) on pp. 16-21, followed by an essay about the author by the editor, John Bangsund, which mentions that Cook also wrote a horror novel which was never published.
https://fanac.org/fanzines/Australian_Science_Fiction_Review/Australian_Science_Fiction_Review21.pdf
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1977 |
|
The Zeitgeist Machine: A New Anthology of Australian Science Fiction | Angus & Robertson | Anthology | 81 |
| 1977 |
|
The Zeitgeist Machine: A New Anthology of Science Fiction | Angus & Robertson | Anthology | 81 |