Mowbray Park runs along the south side of the Lane Cove River in Lane Cove West. There are many paths through it. As the land drops quite steeply to the river there is a nice mix of clifftops, riverside, mangrove swamps, even a waterfall (of sorts). This cache will take you along a few of these paths and through some of the different areas.
To find the Latitude and Longitude of the cache you will need to find the numbers hidden at WP1 and WP2. WP1 has the difference between the decimal minutes of the Easting and the Southing. WP2 has the sum of the decimal minutes of the Easting and the Southing. Some very simple maths will give you the original numbers (ignore a minus sign if you get one). They need to be substituted into S33 48.xxx and E151 09.yyy. The smaller one is the Southing (xxx).
The cache itself is camouflaged and will hold a small travel bugs. It could hold a small pen, but I forgot - so please bring your own. I replaced the cache in early 2016 after the original disappeared in a storm. The new cache needs to be opened and closed carefully. One part is a tight fit - so lever it out carefully and push it back fully. The outer parts only work one way round but that should be obvious. Please replace all three hiding places carefully and covered (where appropriate).