1927 · Driverless Underground Mail Railway · Werk 734 von 1.871

A station of an underground postal railway of 1927 deep beneath a sorting office in London, a tube-shaped room lined with bolted cast-iron ring segments painted white, a narrow concrete platform beside two tracks of sixty-one centimetre gauge, at the platform a low driverless electric wagon of dark painted steel carrying four upright removable mail containers of sheet steel with rounded tops, filled with grey canvas sacks, two workers in waistcoats, rolled shirt sleeves and flat caps seen from behind pushing one wheeled container onto the wagon, pendant lamps with white opal glass globes along the curved ceiling, at the far end the black round mouth of the running tunnel.