To begin, you must venture to where the ground is zero.
There, you will find a sign of caution.
Stare at the sign and contemplate its meaning, then spin around clockwise 9-3/4 times.
You will now be facing a beaten path, meandering off slowly to the left.
Follow the path past tables for picnicking and a place for resting, until it is joined by itself from another direction.
Continue Southeast until you reach the well-trodden trail that is all that remains of the old train's route.
Here, you will find an inscription proclaiming the rules governing the Park of McCormick.
To the south, you will see three sentries, guarding access to the trail. Pass by them carefully and continue to the south.
After slightly more than one hundred Imperial feet, you will reach the Bridge of Beaver Deception!
Trod softly across the bridge, abandoning any elephants or dragons, to avoid disturbing the Trolls who may have taken residence there.
Shortly after the bridge, on the right hand of the trail you will find a marker for the mysterious Atandt, who has buried its eye fiber nearby.
Directly across from the marker, on the east side of the trail, you will find a stand of four companion trees. What you seek lies between the two on the left.
Please use caution and stealth while retrieving the container, as many muggles pass by this spot at all times of the day, and ensure proper cover of the cache when you are done.
A (used, unfortunately, as it's difficult to find new copies in the US) copy of Harry Potter and the Philosopher's Stone is in the cache as an FTF prize! The cache has been stocked with some Harry Potter themed swag and there is a small, simple Harry Potter themed stamp, for those who have letterboxing journals. Please leave it in the cache for other cachers to use.