Caleb Atwater (1778-1867) was a lawyer and amateur archaeologist who lived in Circleville, Ohio. He epitomized the Speculative Period of American archaeology and his fieldwork in Ohio, described in this book, remained unsurpassed until Squier and Davis's classic Ancient Monuments of the Mississippi Valley published in 1848. Published originally by the American Philosophical Society 1820, this book is a facsimile of that edition that includes the Introduction by Jeremy A. Sabloff that accompanied the 1973 edition by AMS Press.