I have lost the reference, but I read somewhere that when the French explorer Sir Duluth heard rumors of an underground lake beneath Lake Superior, he quipped in his native tongue, “Lac d’Enfer” (literally: “Lake of Hell”). This nomenclature was mistranslated by English-speakers, becoming anglicized as “Lake Inferior” — an insidious malapropism that replaced the original meaning.
Sept. 8, 1870
Copper-helmet diver William Bitter found an entrance to Lake Inferior. He was working by the breakwater wall for the city of Duluth, offshore of what is now the Lakewalk. A large storm had damaged the wall, and he was conducting an underwater survey at the end of a 20-foot lifeline.
Working the winch and the air pump, his support team on the wall heard Bitter cry out through the speaking tube, then noticed a whirlpool opening up. They winched Bitter out as loose boulders and timbers were sucked into it.