Complex sentence: The Dutchess and Columbia Railroad was chartered September 4,1866 to build a line from Fishkill on the Hudson River northeast and north to the New York and Harlem Railroad at Craryville.
Split into simpler sentences: The Dutchess and Columbia Railroad was chartered September 4,1866. It was to run from Fishkill northeast and north to meet the New York and Harlem Railroad at Craryville.