MAIL TRAIN • DICCIONARIO INGLES.COM • Definition of Mail train

... crosses the boundary line into the United States and enters at once the swelling current at Vanceborough, Maine. Leaving that place at 1.35 A.M., Monday, without delay it reaches Boston at 5.10 P.M., is transferred across the city, leaves at 6.00 P.M., connecting with the fast mail train from New York City at Albany, through Syracuse, Rochester, and Buffalo, reaches Cleveland at 6.00 P.M., Tuesday, and Chicago at 6.00 A.M., Wednesday, where an intermission of six hours makes the longest delay in the line of connection. ...

— The Bay State Monthly, Vol. 1, Issue 1. - A Massachusetts Magazine of Literature, History, - Biography, And State Progress • Various