Original sentence: The abandoned Lincoln farmstead was later settled by the Whitley family, who lived on the site for several generations, building a dam across the Sangamon river to power a small flour mill.The park contains mature second-growth bottomland timber, including black walnut trees.The state memorial contains the site of the homestead, from March 1830 until March 1831, of pioneer Thomas Lincoln and about 12 members of his extended family, including grown son Abraham Lincoln.The state memorial site also contains the Whitley's pioneer cemetery; the remains of their flour mill and dam lie on the Sangamon river south of the cabin site.The state memorial, created in 1938, now serves as a park and picnic area for the greater Decatur, Illinois metropolitan area
Edited sentence: Archeologists have not yet discovered any evidence of the exact location of the Lincoln family's 1830-1831 cabin, and the cabin may have been located within or slghtly outside the state memorial boundary.The abandoned Lincoln farmstead was later settled by the Whitley family, who lived at the site for several generations; the Whiteleys built a dam across the Sangamon river to power a small flour mill.The park contains mature second-growth bottomland timber, including black walnut trees; the Whitleys' pioneer cemetery; and the remains of the flour mill and dam on the Sangamon river.The state memorial is believed to contain the site of the homestead, from March 1830 until March 1831, of pioneer Thomas Lincoln and about 12 members of his extended family, including grown son Abraham Lincoln.The state memorial, created in 1938 on the Whitley site, now serves as a park and picnic area for the greater Decatur, Illinois metropolitan area