The train had to start working harder when it left Marysville with an elevation of 40 feet above sea level.
Perhaps TWAIN could hear the steam and puffing of the engine.
ENGLISH CROSSING was the highest summit on the railraod at 125 feet above sea level.
The grade of the railroad was a little steeper on the way down to Silvana.
The sound of the train would have gone almost silent.
See Railroad Grade diagram at bottom of this page.