Squier & Davis
Trefoil Earthworks from Acient Monuments of the Mississippi Valley. Appears the orinatation is off with the position of Trefoil Like Liberty Township works and some others. I aligned it by the Roads and the topography in the LIDAR.
Trfoil GIS over LIDAR. GIS is approximate.
Approx GIS of Trefoil using mearsurments given.
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