Sorry, this link might be broken.
https://trove.nla.gov.au/work/254892667?title=The%20Wizard%20of%20White%20Cliffs.%20A%20Weird%20Story%20of%20the%20Discovery%20of%20the%20Australian%20Opal%20Fields
The website may no longer be active, or the URL of the page may have changed.
It is possible that either https://archive.org/web or http://pandora.nla.gov.au have archived this content.
Thank you.
Source : Woods, Barbara. The Adventurous Koalas.
J. T. Picken, 1944