Bill, I wondered about the Ft. Worth to El Paso line as well. Perhaps the T&P ran the Dome to New Orleans but missed inclusion the Official Guide. Some large library may have a collection of them, but it’s doubtful. Perhaps the NMRA library in Chattanooga?

I used to ride the Texas Eagle from St Louis to LR in the late 1950’s and early 1960’s. The summer was nice, but in December there was just a brief bit of twilight before the darkness. However, I always enjoyed seeing all the small towns arrayed with Christmas decorations. Not surprisingly, the trips in December seemed to take twice as long as the trips in June.