Rosie Bolt Reserve and many other parcels of reserve land were recently revealed as being investigated for sale in an official information act request.
Rosie Bolt Reserve is one of many "hidden" reserves that appear to be part of the neighbour's property but is in fact public land. Because local residents aren't aware that it is public space, it isn't used, and because it isn't used it has been targeted for sale by Council bureaucrats.
Background information (not required reading for locating the cache):
* Proposed land sell-off upsets North Shore local boards
* North Shore Reserve Land Investigated For Sale
21/04/2016 UPDATE: Cache is now a camouflaged mint tin. Sorry, no room for trackables or goodies.