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Rich, the link below shows a bridge at about a 45 degree angle Station between Taylor and 12th leading to the Grand Central Station.  <A href="http://www.lib.uchicago.edu/e/su/maps/chi1900/G4104-C6A15-1905-C5.html">http://www.lib.uchicago.edu/e/su/maps/chi1900/G4104-C6A15-1905-C5.html</A> No luck on finding a map that extends further south.  That map is based on many Sanborn maps. Insurance companies used them a lot because of the detail.  Each map covered a limited area. These maps can be purchased but are in some libraries, the Chicago Public Library for one. Browse the internet for more. When I lived in Poughkeepsie NY, I would train down to NYC and visit their library.  They would let me look at old railroad Guides that were so old the pages would shatter when turned!  If I had been in control, I wouldn't let a yokel like me anywhere close to those things! Have you tried visiting the Chicago Library? Art
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