On the telegram that Letty writes at the Harrisburg bus station, she writes the day as "11/18", but according to the calendar hanging on the wall in the background, the day is the 30th.
Letty's telegram is addressed to her care of MacAdam bus lines, even though the bus, and all its stations are clearly identified as Greyhound Lines.
After leaving "West Pittsburgh", the bus would have been no farther than Ohio, when it passes an Atchison, Topeka and Santa Fe locomotive. That railroad did not operate west of Chicago.