Fig. 5. Composite of four aerial photographs of the Carlinville, Illinois, area taken on 28 March 1993 by the Illinois Department of Transportation. The photos are filed in the University of Illinois Map Library as Macoupin County 1993 aerial photographs ST 41 498, ST 41 491, ST 40 489, and ST 40 491. The individual letters on the photos are to help viewers quickly locate the same area. RN indicates the approximate location of Robertson’s neighborhood a few blocks south of Blackburn College, where he taught. SR 4 and SR 108 are state highways. Locations A through E are common to all three photos, whereas F is common to 1937 and 1993 and G and H are common to 1968 and 1993. Click on the image below to view a high-resolution copy of the composite.