London Nightmen. These men who are carrying the contents of a cess pool in a wooden tub, carried out their smelly, dirty job at night. Their candle lanterns are on the ground. The tub would be carried out into the street and its contents tipped into a horse-drawn tanker. The tanker would then be taken to market gardens on the outskirts of the city where it's contents would be used as fertiliser. Engraving from London Labour and the London Poor by Henry Mayhew (London, 1861).