I put out my very first Geocache here in Mulligan's Flat Nature Reserve back in 2014 - and it was a Letterbox Hybrid ! See GC5AHG5 Souvenir Letterbox. I have had lots of nice comments on that cache and this location, so during a walk with Dad and minniek I placed a few more to tempt people out this way - specifically the Border Track. I have called this the Mulligan's Mailbox Series.
I suggest you park at approx. S35 09.113 E149 09.817, step through the step-through gate, and follow the Border Track, only heading off track for each of the Letterboxes.
The stamp in the cache is to remain in the cache. Feel free to use it in your Letterbox Hybrid Stamp Logbook (if you have one) and also if you have a personal stamp please use it in the cache logbook.
Please BYO Pen/Stamp.