early to mid 1800's mill location - melbourne Australia

Gday all went on a hunt today at a local reserve here in Melbourne Australia, I think I have found a location where an old mill used to be between 1845 and 1875. Found a few Aussie pennys dating around mid 1900's and a couple of relics. Here is the video hope y'all enjoy it thumbsup01

md with spanners no 3

nice finds your making over there,good job.