I used to live in Upper Darby, Delaware County, Pennsylvania. And the old Cardington Branch tracks use to run right behind my neigborhood on Andover Drive and the right of way ran near darby creek. I was shocked to hear about it when i read the Hobo's guide of the Pennsy. I do not know the exact spot were the tracks were because of the rows of houses but i do know it branched off the Newtown Square Branch. Does anybody remember the Cardington Branch??? Any articles written on the branch??
I believe that the PRR Technical and Historical society published a comprehensive article on the Cardington Branch. It is readily available in reprint at many hobby stores and, I think, at the SEPTA store at 1234 market. I hope that this will help you to reconnect.
SEPTA FAN