It wasn’t an April Fool’s Day stunt, but the “petrified man” found inside a Rusk County tree was one of the biggest hoaxes in Wisconsin history. Supposedly it was the body of Pierre d’Artagnan, an elite French soldier who disappeared during Marquette and Joliet’s 1673 voyage of discovery. The hoax still circulates today, though it was launched way back on Thursday, Jan. 21, 1926, by The Rusk County Journal, published in Ladysmith. The Wisconsin Historical Society maintains a webpage about the hoax “because,” it states, “we still occasionally receive sincere inquiries about the so-called ‘petri…