"Their (cupstones) occurrence in different countries make distribution a basis for drawing inferences bearing on the important question of the migration of man in long-past ages." -Charles Rau, Preface, Observations on Cup-shaped Lapidarian Sculptures in the Old World and in America (1881) Observations on Cup-Shaped and Other Lapidarian Sculptures in the Old World and in America: On Prehistoric Trephining and Cranial Amulets-A...