I don't see a Penn Central fallen flag tab, so I'll go with PRR. Does anyone know which of Morning Sun's Penn Central In Color books covers the PC in the Alleghenies? I'm interested in seeing the line between Altoona and Pittsburgh and the book titles don't help. We have: Penn Central In Color Volume 3: From the Potomac to the Alleghenies Penn Central In Color Volume 4: West of the Alleghenies Thank you.