Here is a Google Map showing the American travels mentioned in the first installment of "The Emigration of Richard Litson." The history, as mentioned before, seems to be written with reference to the diary of Richard Litson, Jr., and a look at the map shows a number of issues that may have had to do with his spelling or the reading of his handwriting by the authors. This map follows current roads rather than the railroad route in 1866, but it is good enough to give a general idea of the route.
At this point I would like to pause for a moment and say thank you to the many dear family members and friends who are assisting with this monumental family history project. It is a comfort and a blessing to have the help and editing notes and typing assistance and collection of materials and the encouragement of so many people.