In 1898, two male lions terrorized an encampment of bridge builders on the Tsavo River in Kenya. The lions, which were massive and maneless, crept into the camp at night, raided the tents and dragged off their victims. The infamous Tsavo "man-eaters" killed at least 28 people before Lt. Col. John Henry Patterson, the civil engineer on the project, shot them dead. Patterson sold the lions' remains to the Field Museum of Natural History in Chicago in 1925.