To All: The Pontiac, Oxford & Northern RR, affectionately known as "The Polly Ann, was a line that ran from Pontiac, Michigan to Caseville, Michigan. The northern end of the line at Caseville was in the "Thunb" area of Michigan. All 111.999 miles were acquired by the Grand Trunk Weatern RR in 1909. In 1955 the line was abandoned. I painted, lettered and weathered this "What If" car in the PO&N scheme. It is part of a series I have done on Michigan short lines in this green scheme stating about 25 years ago. Photo by Elvin Howland. Yours, Elvin Howland/E. St. Louis Rail Group Layout.