Daniel could not see where they were going, but he could smell it now, and he could feel the carriage swerving away from the foot of the Holborn Bridge, and slowing to negotiate the turn southwards. He leaned forward and looked out the window down the length of the Fleet Ditch, a black and apparently bottomless slot in a long slab of unspeakably stained pavement, running due south to the Thames. The sky above the river shed a flinty twilight on this gap, from which the buildings of the city seemed to draw back in dismay. In defiance of Mr. Threader’s optimistic prediction, an ox-cart, consisting of a giant barrel on wheels, had backed up to the edge of the ditch and opened a large orifice in its rear to spew a chunky brown cataract into this, the least favored tributary of the Thames. The sounds coming up from the depths below, indicated that it was striking something other than clear running water. Making a quick scan of the length of the Ditch between them and the Fleet Bridge, about a quarter of a mile downstream—if "downstream" had any meaning here—Daniel saw two other such carts doing the same thing, or getting ready to. Other than the usual crew of idlers, vagrants, thieves, shake-rags, and disgraced preachers selling instant weddings, there was no traffic, other than a single sedan-chair, which was just emerging from an alley on the opposite bank of the ditch, and in the act of turning north towards Holborn. As Daniel caught sight of it, it faltered and stopped. The faces of the two men carrying it waxed like a pair of moons as they turned to look at Mr. Threader’s train. Then the carriage in which Daniel was riding executed its turn. The Ditch swung out of Daniel’s view, and was replaced by the first in a various row of cookeries and market-stalls, not all that bad here, close to Holborn, but bound to degenerate rapidly as they moved on. Daniel turned his head the other way to look out at the Ditch. A slablike wall rose from the opposite bank, ventilated by a few windows barred with heavy grids: the front of the Fleet Prison. His view was then blocked by the nostrils of an ox towing a vault-wagon. A whiff came in the window that paralyzed him for a few moments.