When I read about the early history of American railroads there is often little or no mention of the Philladelphia & Reading.
In A History of the American Locomotive, John White seems to mention the Philadelphia & Reading just as often as the B&O when it came to importing locomotives from England or new locomotives developments by American builders.
Wikipedia’s description of the Reading describes the Reading once “as one of the most prosperous corporation in the United States”. In other books, the Philly & Rdg is described as one of the largest corporations in America, at that time.
I realize the Reading Company is a coal company and the railroad, or collection of railroads,
were assembled to haul coal from the anthracite fields.
It is not like the Delaware, Lackawanna and Western which also developed as a coal hauler
but became a more widespread transportation railroad. It is similarly unlike the Pennsylvania which it competed with and the B&O.