A 1924 expedition to Hava Supai Canyon, Arizona, in the Grand Canyon, uncovered several remarkable ancient pictographs of strange creatures that have been interpreted by some as depicting extinct species or animals that aren"t known to exist in this part of the world. This is a facsimile reprint of the original 1925 report. Это и многое другое вы найдете в книге BioFortean Reprint: The Doheny Scientific Expedition to the Hava Supai Canyon, Northern Arizona (Samuel Hubbard, Charles W. Gilmore)