A gravity railroad was built along this mountain in 1827 to carry coal from the mines near Summit Hill to the Lehigh Canal at Mauch Chunk. A back-track and two planes were added in 1844 for the return trip by gravity. Railroad crossed the highway . . . — — Map (db m125636) HM
”Leaving Mt. Pisgah, the weight of the car was again its motive power, and the slight decline in the grade carried it at the speed of eighteen miles an hour to Mt. Jefferson, a distance of six miles and one furlong…”
. . . — — Map (db m125628) HM