If it remains civil I don't think we will have to worry too much. If you are interested in more detail with respect to this issue and railroad history I'd recommend the following:
Railroads in the African American experience : a photographic journey – Kornweibel, 2010(edition 2010)
Recollections of a Sleeping Car Porter – Thorne (pseudonym), Fulton - 1892(edition 1892)
Memories of a retired Pullman porter – Turner – 1954
Rising from the rails : Pullman porters and the making of the Black middle class – Tye - 2004
The first one is curious as far as the subtitle goes. It is true that there are photographs but it is a written history and I've never understood why the publisher felt the need to tack on the photographic part. From the standpoint of an overall discussion of the subject and the railroads it is probably the best place to start.
The next two are first person accounts of railroad life and the last one is a history of the Pullman porters both from a railroad as well as a social point of view. I've read all of them and I think they are all well done.
