Mahlon Pitney, Southern Pacific Company v. Schuyler…
“ It is plain that the decision adverse to the plaintiff in error was upon two independent grounds, the second ground being avowedly based upon the hypothesis that the court might be wrong in its decision upon the first.Whether the Hepburn act prohibits a carrier from giving free interstate transportation to the employees of the railway mail service when they are not on duty, but are traveling for their own benefit or pleasure, is, of course, a Federal question. ”
