Note 29 — Chapter VI · Industry, Commerce, and Social Organization; Fights, Wounds and Trepanation.
N. D'Anvers translation
American Ass., Detroit, 1875, Nashville, 1877; “Ancient Men of the Great Lakes” “Additional Facts Concerning Artificial Perforation of the Cranium in Ancient Mounds in Michigan.” See also on this question generally Fletcher “On Prehistoric Trepanning and Cranial Amulets,” Washington, 1882.