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IN preparing this volume the writer has endeavored to avoid such a multiplication of references as would be con fusing or burdensome to the reader, and yet at the same time sufficiently to indicate. The sources of information which he has found most helpful, and to give due credit to authors from whose works quotations have been made. He is convinced that more of the customs, beliefs, and ceremonial institutions that to so great an extent make up our social life and civilization are connected with early agriculture than has been generally acknowledged.
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