Robert Jackson delivered the opinion of the Court in this case that dealt with the Brotherhood of Railroad’s call for the Terminal Railroad Association of St. Louis to provide cabooses on all trains to accommodate the railroad switchmen. At the time, railroad switchmen were extremely vulnerable to injury since they were required to ride on the train’s top or side during travel. The Supreme Court decided in favor of the Brotherhood of Railroad and ruled that cabooses must be attached for switchmen on runs both within the state and across state borders.