When they reconvene in their childhood treehouse after Billy's funeral, they discover the treasure map he drew, along with a cereal box compass, and decide to honor his memory by venturing into the wild and fulfilling his quest.
2.
The first use of a magnetized needle for seafaring navigation in Europe was written of by Alexander Neckham, circa 1190 AD . Around 1300 AD, the pivot-needle dry-box compass was invented in Europe, its cardinal direction pointed north, similar to the modern-day mariners compass.
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