Hiawatha
This piece is called Hiawatha. Recently, I happened to see a Milwaukee Road steam engine from the 1930s pulling a bunch of vintage passenger cars cerca 1950 on the mainline it used to serve heading toward Union Station in Chicago. The last couple of cars were from the Hiawatha, including the lounge car in this painting.
Later, I saw it depart from Union Station on an excursion trip to a steamboat festival on the Mississippi. The train is in revenue service all over the upper midwest. If you want to see the country from some beautifully restored rail cars from the middle of the last century, you should check it out.