The Shenandoah Valley Railroad had considerably backing from another railroad with what nickname?
Shenandoah Valley Railroad (1867–90):  The development of this railroad had considerable backing from the Pennsylvania Railroad. Pennsylvania Railroad: The Pennsylvania Railroad (reporting mark PRR) (or Pennsylvania Railroad Company and also known the "Pennsy") was an American Class I railroad that was established in 1846 and was headquartered in Philadelphia, Pennsylvania.
"Pennsy"