This historic map was photographed in two sections and then these sections were spliced together. You get an 300 dpi edited three-color reproduction. Period images, showing possible travel options available to the escaped slaves, have been added as a visual aid for teachers.
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You will get a link over the internet that can be used to the above file.
I also have an archival two-color paper version, printed from a higher resolution file, of this map available.