The art gallery
Lord Porter's Art Gallery was an art gallery and store run by Lord Porter in unit 6937 of Rampone Dockside Shipping Building A. It was a spacious, two-storey unit, but the elevator controls on the first floor were broken.
Though his main business was selling pieces of art, Lord Porter also ran a second, illegal business on the second floor of his unit. This business involved a lady who entertained various clients in the second floor office. E. B. Bramrich, who occupied the unit directly below the second floor office, complained of strange noises late at night.
It is likely that the elevator controls were left broken on purpose to keep his brothel secret when the yearly inspection was conducted[1].