Except for milling stones that seem to have been used to grind paint in Chile,[4] the preagricultural querns occur mainly in the area of California, the Southwest, and upper Mexico. Through California, from Borax Lake and the Mohave Desert, to the Cochise area of southeastern Arizona and the Edwards Plateau of central Texas, and on into northwestern Mexico, these grinding tools turn up with artifacts and in geological strata that may be from 6,000 to 25,000 years old. If those dates are correct, then we have milling stones in the New World many years before there was any agriculture. The explanation must be that some of the earliest of the Americans were food gatherers and grinders of nuts and seeds as well as hunters. In addition to their querns, they have left us hearths on beds of collected stones, rude knives, rough percussion tools such as scrapers and choppers, but very few spear points. There is no early culture of this sort now known in Asia or Africa. It is not Folsom. Is it Australoid? Does it go back to a type of people who, in some hybrid and degenerate form, settled Australia? At least we know that the culture of the Australians is a curious mixture of very primitive traits with some elements of the polished stone work of the New Stone Age and milling stones. They are nearer being food gatherers than hunters. The Puzzle of the Points With the first hunters in the New World—the men who made the Sandia, the Folsom, the Plainview, and probably the early Eden points—we come to another puzzle. The Sandia is shaped like a much superior point made by the Solutreans of Europe and an equally crude one made in Africa, but the best Folsom is better than the best Solutrean. The fluted channels of the Folsom are remarkable enough; in addition, the edges are sharpened by the removal of almost microscopic flakes, and the base is often carefully ground. We know that such points were being made at least 10,000 and perhaps 15,000 years ago. The Eden point is doubtless newer, yet it must antedate the only chipped weapons that can equal it, the daggers of neolithic Egyptians 7,500 years ago or of the still later Danes.