(Joseph Duncan, 1834) in Duncan Park in Jacksonville, Morgan County, IL. Park St. N. 0.75 miles from jct with Morton Av., W. on State St. 0.3 miles, N. (curves E.) into the park 0.1 miles to the mansion on the N. side of the road. (N39 44.147 W90 14.963) Photo 10-29-09.