Dear Dr. Eric,
Thank you for the map, it was quite interesting following the route. I noticed that it never reached Warsaw. And now for a little tidbit.
I recall hearing that someone coming, I guess from the Far East, popped up with the black plague in California. I think it was Los Angeles, and in and about the end of the 1920's. Fortunately the health department realized what the person had, and was able to find everyone that he/she came in contact with. Otherwise the situation might have been horrific since antibiotics didn't exist.
Zenovia