The Pirate's Letterbox starts outside a small rotunda and picnic area (for your BBQ of course!)
When you have finished eating, a bit of training needs to be done - onto the climbing wall near the tube slide.
Then grab your eye-patch and parrot and make your way to The Black Sapphire!
Did I remember to tell you that you need to count things on the way?
Take note that the Treasure map on the boat is to the treasure chest, but not the cache.
To find the cache you need the following information:
Number of hotplates near the rotunda
Number of tables both under and outside the rotunda
Half the number of coloured climbing blocks
Number of masts on the boat
Number of telescopes you can use (not counting the Monkey's or the Lookout's)
What colour sapphire was it? Number of letters
Number of monkeys + octopus(es)
Number of canons sticking out of portholes plus big anchor(s) on the bow
Number of spokes on the wheel
Number of parrots in the rigging
Take off your eye-patch (we don't want you walking into any trees!), and make your way to the real treasure.
Note: please leave the stamp in the cache, it is not a swap.