In the mid-1600s, a Jesuit priest serving in Peru got a useful tip. The indigenous people there, he learned, were using the bark of a particular kind of tree to treat fevers. The priest, who'd probably gone a few rounds himself with the local diseases, got ahold of some of the reddish-brown bark from this "fever-tree" and shipped it back to Europe. In the 1670s, what came to be called Jesuit bark had made its way into a popular patent medicine, along with rose leaves, lemon juice, and wine.
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