Description
The Portland, Saco and Portsmouth Railroad (PS&P) was a railroad in Maine that ran from Portland via Saco to North Berwick.
See also: https://en.wikipedia.org/wiki/Portland,_Saco_and_Portsmouth_Railroad
Related Subjects
The graph displays the other subjects mentioned on the same pages as the subject "Portland, Saco & Portsmouth Railroad". If the same subject occurs on a page with "Portland, Saco & Portsmouth Railroad" more than once, it appears closer to "Portland, Saco & Portsmouth Railroad" on the graph, and is colored in a darker shade. The closer a subject is to the center, the more "related" the subjects are.