Interior design was spartan and around 1900 third-class passengers sat on bare boards five abreast, second-class passengers on cushions also five abreast, while first-class passengers sat four abreast and enjoyed more legroom. In 1899 James Holden produced the first six passengers sat abreast carriages in a 13-carriage, third-class only train (each carriage was long and wide and had five compartments). This set, which also included such modern features as slam lock doors and gas tail lamps became the model for future suburban carriage design.