Leslie Ragan's train posters... after serving in WW1, he took one semester of Art Institute of Chicago, then taught at the Academy of Fine Arts Chicago. That's natural talent!

and this last one I'm reposting, though I know you've seen it before, because I wanted you to know who the artist is, now that I know, which is something he's not been credited with before to my knowledge.

Ragan was born in 1897 and grew up in Iowa. From an early age he knew he wanted to be an artist, and often made drawings of buildings and bridges. Ragan was mostly self-taught, although he did attend the Cumming School of Art in Des Moines. He served in the Army Air Corps in World War One, and upon returning studied for a single semester at the Art Institute of Chicago. In the early 1920’s, he went on to teach at the Academy of Fine Arts, also in Chicago. By 1930 he had relocated to New York and had begun painting for the New York Central.

http://poulwebb.blogspot.com/2014/09/vintage-travel-posters-part-2.html