(~80', 38-15-s) across Buck Run on abandoned RR tracks S. of Ercildoun, East Fallowfield/West Marlborough Township, Chester County, PA. Buck Run Rd. S. 1.7 miles from jct with Doe Run Rd. in Ercildoun to the bridge on the E. side of the road. Across the road from 150 Freckle Farm. Can be seen from road if the leaves are not out. (N39 55.434 W75 50.812) Photos by Pat Cook 4-20-13.