Try to find the spot where the photographer was standing.
trove.nla.gov.au/work/227586160 - this PHM Henry King pic was taken in the same general location...slightly further back...and more to the right...if you zoom in, there are a couple of the dead trees in the background which line up...I'd say the MacPherson and King pics date from a vaguely similar period...maybe the same decade...spot the similarities differences!
[https://www.flickr.com/photos/[email protected]] Good call. I think you are by now an expert on the valley.
[https://www.flickr.com/photos/beachcomberaustralia] No way! I'm still doing my apprenticeship!