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The prehistoric Erie Indians built a fortification across this neck of land sometime before 1650. A low wall is all that remains today of a stockade where earth had been piled at the base of posts. The stockade and the naturally steep embankments of the ridge provided a safe location for an Indian village.
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The Nettle Lake Mound Group consists of 4 low mounds overlooking a stream that runs into Nettle Lake. The mounds vary in height from 1 to 3 feet and in diameter from 18 to 30 feet. The mounds are composed primarily of reddish-brown sand (secondary mound) covering a layer of darker sand and loam (primary mound). These mounds have been partially excavated in the past by pot hunters in search of relics. Although the records of these excavations are vague and incomplete, pottery fragments, burials, and flint artifacts found in the mounds indicate that they were constructed by the Hopewell Indians.
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Established as the county seat of Pickaway County in 1810, Circleville derives its name from the circular portion of a large Hopewell-era earthwork upon which it was built. The Circleville earthworks, described in 1772 by Rev. David Jones for a Boston magazine, comprised an 1,100 foot diameter circle connected to a 900 foot square. Town director Daniel Dreisbach platted the town directly atop the earthworks, integrating the town plan into the prehistoric landscape. An octagonal courthouse stood directly in the center.
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On this bluff lies one of the two great animal effigy mounds built by Ohio’s prehistoric people. Shown here, Alligator Mound is a giant earthen sculpture of some four-footed animal with a long, curving tail. Archaeologists believe the animal is perhaps an opossum or a panther, but not an alligator. The earthwork is approximately 250 feet long, seventy-six feet wide, and four feet high. Like the Great Serpent Mound in Adams County, Ohio, Alligator Mound is not a burial mound. The Newark Earthworks, built by the Hopewell people between 100 B.C. and A.D. 400, are three miles to the east. Scholars do not know who built Alligator Mound, but it may be the work of the Hopewell.
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Born in North Adams, Massachusetts on December 23, 1778, Caleb Atwater graduated from Williams College in 1804. He moved to Circleville in about 1814 where he organized the city’s first school board and served as postmaster and prosecuting attorney. His life and work as a teacher, minister, lawyer, legislator, and scholar greatly influenced early 19th-century Ohio. Upon arriving in Circleville, he became interested in local history and the nearby earthworks and in 1820 published his book Descriptions of the Antiquities Discovered in the State of Ohio and Other Western States, the first compilation of prehistoric remains in the Ohio and Mississippi valleys. Elected to the Ohio State Legislature in 1821, Atwater fervently supported canal construction. He also chaired Ohio’s first board of school commissioners and was instrumental in passage of Ohio’s Public School Law. For this, he has been called the “Father of Ohio’s Common Schools.” (continued on other side)
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The American Civil War was in its second year, and Confederate forces were advancing in the east and in the west. Confederates led by General Edward Kirby Smith had defeated a Union Force at Richmond, Kentucky on August 30, 1862. Word was received that they were advancing on Cincinnati. Ohio Governor David Tod issued a proclamation to all Ohioans: “Our Southern border is threatened with invasion. I therefore recommend that all the loyal men of your Counties at once form themselves into military companies. Gather up all the arms in the county and furnish yourselves with ammunition for the same. The service will be but for a few days. The soil of Ohio must not be invaded by the enemies of our glorious government.” (continued on other side)
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For more than 10,000 years, Flint Ridge was one of the most important flint quarries in eastern North America. The flint formed at the bottom of a shallow ocean 300 million years ago. The softer rocks surrounding the flint have washed away, leaving the hard flint exposed near the surface. Prehistoric people came here to quarry the flint, which they crafted into a variety of stone tools. Hundreds of quarry pits and workshops are scattered for miles along this ridge. The beautiful rainbow-colored flint was especially prized by the Hopewell culture that built the nearby Newark Earthworks. Artifacts crafted from Flint Ridge flint may be found throughout eastern North America. In more recent times, local industries quarried the flint for use as grindstones.
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Archaeologists believe that this prehistoric mound, part of a complex of earthworks, was used for rituals by the Hopewell people and was probably built between 100 BC and 400 AD. Note the painted post tops marking the Hopewell pole house footprint. The mound is recorded on the National Register of Historic Places and was given to the Worthington Historical Society in 1974 in memory of Herman Plesenton Jeffers.