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 existed without either flocks and herds, or field agriculture with the use of the plow. In some favored areas, where the facilities for irrigation were unusual, a considerable population has been developed upon horticulture; but no traces of irrigating canals have been found in connection with the works of the Mound-Builders. Furthermore, it was unnecessary in their areas. Transplanted from a comparatively mild to a cold climate, they must have found the struggle for existence intensified. Like the Cibolans in 1540, it was doubtless at all times equally true of them, that "they had barely provisions enough for themselves." And yet there is no cereal equal to maize in the rich reward it returns even for poor cultivation. It grows in the hill, can be eaten green as well as ripe, and is hardy and prolific. At the same time, while it can be made the basis of human subsistence, it is not sufficient of itself for the maintenance of vigorous, healthful life. Vegetables and game were requisite to complete the supply of food. The difficulties in the way of production set a limit to their numbers. These also explain the small number of their settlements in the large areas over which they spread. Although they found native copper on the south shore of Lake Superior, and beat it into chisels and a species of pointed spade, the number of copper tools found is small, much too small to lead to the supposition that it sensibly influenced their cultivation. A pick pointed with a stone chisel, a spade of wood, and a triangular piece of flint set in a wooden handle and used as a knife, were as perfect implements as they were able to command. Horticulture practiced thus rudely was necessarily of limited productiveness.

The idea has been advanced that "the condition of society among the Mound-Builders was not that of freemen, or, in other words, that the state possessed absolute power over the lives and fortunes of its subjects." It is a sufficient answer to this remarkable passage that a people unable to dig a well or build a dry stone wall must have been unable to establish political society, which was necessary to the existence of a state.

From the absence of all traditionary knowledge of the Mound-Builders among the tribes found east of the Mississippi, an inference arises that the