Joseph Rucker Lamar,
Smith v. Texas (233 U.S. 630)…
“ The engineer is constantly with the train and knows all of the signals, knows how the couplings are made, knows how the cars are switched and distributed, and knows how they are taken into the train and transported from one place to another. An engineer is so constantly associated with all the work of a conductor on a freight train that he should know as much about how a freight train should be operated by a conductor as the conductor himself. ”
