Parker's Sectional & Geological Map Of Iowa. Exhibiting her Iron Lead Copper Coal and other Geological Resources And All Rail Roads Completed, in progress, and projected. Compiled from the U.S. Surveys and personal reconnoisance. By Nathan H. Parker. Author of "Iowa As It Is" Clinton Io. 1856. J.H. Colton & Co. 172 William St. New York. D.B. Cooke & Co. Chicago Ill. Entered ... 1856, by N.H. Parker... Iowa. Engraved, Printed And Mounted By J.H. Colton & Co. 172 William Street, New York. (inset) Map Showing the Connections between the Iowa And Eastern Rail Roads.