(IL-74-02) N. of Monticello, Monticello Township, Piatt County, IL. IL105 (changes to Old Route 47) N. 0.4 miles from jct with I72 exit 166 N. of Monticello, W. (curves S. & back W.) on Walden Dr. 0.4 miles to the house on the S. side of the road at 1795. Can be seen off the N. side of I72. (N40 03.188 W88 34.104) Photo 8-22-04.