Cimarron River was built for the St Louis-Tulsa-Oklahoma City train "the Meteor". All sleeping cars built for the Meteor were named for rivers along the route. The Texas Special sleeping cars were all named for people important to the history of Missouri and Texas. All cars were identical except for the names. Unclear how long the railroads strictly kept the cars on the routes they were built for. The Frisco RR stopping their participation in the Texas Special in the late 50's, maybe only 10 years after the trains were streamlined. Therefore, I would tend to think the cars stayed with their original trains. As for the Penn Texas, it was the eastern connection for the Texas Special and the MP Texas Eagle. So, the through cars would have been from those trains. For a couple years, the Meteor had through cars to Chicago and I think a car to the east on the B&O. I'm not sure any documentation exists now that would identify which specific cars were on the specific trains.
In the early sixties, Cimarron River operated on the Kansas City-Florida Special (KC to Jacksonville). It ran through Memphis and train consist notes do exist showing it ran on that line. Passenger business declined on the Frisco and the car was sold to Canandian National (with many sister cars) in 1965. Rebuilt then and renamed Rainbow Falls, painted in CN two-tone black and gray.
I have a photo of Rainbow Falls running into Chicago on the International in 1970. But have never seen a photo of the car in service while on the Frisco.
Long answer, but now you know what I know.
Tony
