I have the key to One-Eyed Willy'.
—Chester Copperpot
Chester Copperpot was a reclusive scavenger from Astoria who went missing in the 1930s while looking for One-Eyed Willy's treasure. His disappearance was noted in a local newspaper, a copy of which was stored in the Walsh's attic. When Chunk reads the story aloud Mikey is inspired to lead the same treasure hunt.
The Goonies find his skeleton in the tunnels where he evidently triggered a booby trap that crushed him under a boulder. They identify his corpse from information in his wallet, which also contains a Lou Gehrig baseball card. They take his candles, dynamite sticks, and the skull-shaped key which the map calls "Copper Bones". Moments later Mikeytriggers the same trap that Chester did, but luckily the Goonies are able to escape unharmed.