The company Frank Graham Thompson was heir to was established in what year?
Redden Forest Education Center:  Now known as the Redden Forest Education Center, the complex includes three Shingle style buildings built in 1900-1902 as a hunting retreat for Pennsylvania Railroad heir Frank Graham Thompson. 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.
i don't know