"Our peace medal has disappeared. We want to offer it as a gift to the indians."
Time Tangled Island
William Clark was an explorer who helped lead the Lewis and Clark Expedition along with Meriwether Lewis. In Poptropica, he appears on Time Tangled Island, and informs you that they're on an expedition across the west. They've lost a peace medal that they were going to give to Indians. This is a result of a time machine malfunction. Read more about the real historic figure on his Wikipedia article.