I am of course a big New York Central and Pennsylvania Railroad nut. I have researched some stuff on the NYC recently and came up with extremely limited information on some of the locomotives on their roster during certain time period(1940's is what my most recent research found, got a PDF which I still have to read over). I was wondering if there is some archive, Library of Congress, public records, any kind of resource that some of you use to dig up engine types, engine numbers, etc., etc. that would be helpful?
One of the only things that I have ever found that was somewhat helpful was a photo archive, which again I have not had the chance to go through thoroughly(a lot of stuff there to go through). It is Richard Leonard's Rail Archive(link below).