Also there was a corresponding big, oblong hole in the ceiling, and one could see above, over the fence of the top floor, some machinery; and right away overhead was the glass roof, and all light for the three storeys came downwards, getting dimmer, so that it was always night on the ground floor and rather gloomy on the second floor.

The factory was the top floor, the warehouse the second, the storehouse the ground floor.

It was an insanitary, ancient place.
Paul was led round to a very dark corner.
"This is the 'Spiral' corner," said the clerk.

"You're Spiral, with Pappleworth.

He's your boss, but he's not come yet.