The Prehistoric World: or, Vanished Races, page 259 by E.A. Allen
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especially the North-west, has been carefully enough explored to state where they begin. It is certain that the head waters of the Mississippi and the Missouri were thickly settled with tribes of this people, and some writers think that they spread over the country by way of the Missouri Valley from the North-west. Mr. Bancroft quotes from the writings of Mr. Dean, to show the existence of mounds and inclosures on Vancouver Island, and in British Columbia. And the statement is made that a hundred miles north of Victoria there is a group of mounds ranging from five to fifty yards in circumference, and from a few feet to fifty feet in height.<12>
The inclosures, however, are described as being very similar to those in Western New York, and are probably simply fortified sites, common among rude people the world over, and such as were often erected by Indians. The remains on the upper Missouri and its tributaries are very numerous, and to judge from the brief description given us of them, they must be very interesting.<13> This section has, however, been too little explored to speak with confidence of these works.
As showing how much care should be exercised in this matter, we refer to the account given by Capt. Wilkes in his journal of the United States exploring expedition. Speaking of the mounds on the gravelly plains between the Columbia River and Puget Sound, he tells us that the Butte Prairies are covered with small mounds at regular distances asunder. Some of them are thirty feet in diameter, six or seven feet above the level of the ground, and many thousands in number. He opened some of them, and found a pavement of round stones, and he thought he could detect an arrangement of the mounds in groups of five, thus.
Illustration of arrangement of mounds.---------
It was his impression that they were the works of men, and had been constructed successively and at intervals of several years.<14> This observation of Capt. Wilkes is referred to by many as evidence of the