The backwardness of certain living American tribes suggests to Sauer that they came to the New World a very long time ago. Their lack of a number of useful skills argues that they branched off from the men of the Old Stone Age when the Australoid ancestors of the abysmal Blackfellows of Australia looked like an up-and-coming people. These early men had the enterprise to reach the New World, but they stuck to old and limited habits of life. They would not learn from new invading peoples, and so they were forced into refuge areas as remote as Newfoundland, Lower California, Amazonia, and Tierra del Fuego. As an example of cultural backwardness and of an inability to learn which recalls the Australians, Sauer cites a people in the Brazilian interior who get along without boiling any of their food. He believes that this tribe acquired its cultural habits in the days before man began to put heated stones into water in pitch-sealed baskets. The primitive resistance of these “Indians” to borrowing new cooking skills like boiling comes out in other directions. “Long in contact with pottery-making peoples, they make casual or no use of pots, but restrict their cooking to roasting and baking, with gourds, a late acquisition, used for carrying water.”[17] Griffith Taylor once wrote to Earl W. Count that, because certain of the now extinct mammals inhabited both sides of Bering Strait in the days of the glaciers, “it is almost impossible that the Australoids (who preyed on them) did not cross into America in Pre-Würm times.” Count supports Taylor with the suggestion that the most primitive of the many stocks that invaded the Americas came “at a time, say, when Talgai man and Wadjak man were en route to their _cul de sac_ in Australia.”[18]