Fast Mail a train which consists exclusively of mail cars. The first one operated between New York and Chicago.
Bibliography:
Romanski, Fred J. "The Fast Mail: A History of the U.S. Railway Mail Service,"Prologue Magazine, Fall 2005, Volume 37, #3, Library of Congress, Washington, DC.
https://www.archives.gov/publicatio...-mail-1.htmlGoogle had this, but led to dead end.
