Mysterious Universe notes that a string of news stories around the turn of the twentieth century reported archaeological discoveries of hidden subterranean habitats and strangely large human remains:
The most famous of these reports appeared in the April 5, 1909 edition of the Arizona Gazette, entitled “Explorations in Grand Canyon.” Explorer G.E. Kinkaid discovered a huge underground “citadel” while rafting on the Colorado River.
Exploring a tunnel that stretched “nearly a mile underground,” Kinkaid found tablets carved with some type of hieroglyphics, and home to a stone statue he described as resembling Buddha. Mummies, all wrapped in a dark fabric, were supposedly more than nine-feet-tall.
The New York Times reported a nine-foot-tall skeleton of a man discovered in a mound near Maple Creek, Wisconsin, in December 1897. The Times also carried the story “Strange Skeletons Found” near Lake Delevan, Wisconsin, in its May 4, 1912 issue. But an April 9, 1885 story entitled: “Missouri’s buried city: A strange discovery in a coalmine near Moberly,” revealed a find that predated the supposed citadel in the Grand Canyon by 24 years.