Early settlers in Ohio's Paint Creek valley found a table top hill surrounded by earthwork walls and evidence of high temperature fires and furnaces built into the walls. Evergreen trees dot the hillside facing the creek valley, so it was given the name "Spruce Hill." In 1963 I accompanied amatuer archaeologist Arlington H. Mallery as he revisited the site where he had claimed to have found a prehistoric iron furnace 1949. Mallery also explored other sites in Ross County, Ohio in 1949-50 and claimed to have found prehistoric iron furnaces in an "Indian" mound in the valley of Deer Creek.
During the spring and summer of 1963, while beginning my career as a newspaper reporter, I accompanied Mallery as he returned to the field, to obtain material from one of his iron furnace sites for carbon 14 dating. I dug into the site and obtained the material he sought. However, Mallery wasn't able to get the carbon sample dated because his old age caught up with him -- he was 86 years old and was experincing difficulties with his memory.
I began my own work in the field in 1989 and have been at it ever since. Photos and more information about Spruce Hill can be found by visiting my web site "America's Mysterious Furnaces." Spruce Hill is a prehistoric hill fort and according to historic evidence, traces of a "lost city" were found in a valley southwest of the hill fort by the first settlers of the area.
However, a closeup image I downloaded from Goggle Earth, when printed out in high contrast, shows a remarkable grid of north-south and east-west lines which strongly suggest there was once a town or village there. This would then be prehistoric, becuase evidence of a such "lost city" up on the hilltop did not show up prior to the availability of online satellite imagery.
Rechecking the view of Spruce Hill on Goggle Earth, I found that the north-south grid lines are very true to the compass, suggesting astromical sophistication of those who created the grid. Also, I viewed other table top hills in the area and found none with similar grid lines.
Using the Google Earth ruler tool, I found the length of one N-S line is about 2,500 feet. Many nearby fields, of course, both in valleys and on hilltops, showed faint images of plowing patterns, but nothing similar to the Spruce Hill pattern vertical and horizontal pattern.
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