One day in the summer of 1850 or ’51 Mother took me with her to the canal market in Pittsburgh.  When we reached the canal, we saw a large parade, the bands were playing, and we were told that the Pennsylvania Railroad officials were coming from Philadelphia to drive the golden spike at the end of their road to the far West.  That was where the Union Station is now.  Well, we saw them come in – a little dinky locomotive and two small, flat cars, carrying ten or twelve officials wearing silk hats and long gray linen dusters.  We did not see them drive the spike, the crowd was too large.  The next time I saw that little engine was in Philadelphia at the Centennial, 1876, and again at the World’s Fair, 1893.¹⁾My Early Life and the Civil War, Conrad Smith, 1920, pages 12-13