As Utterson takes the police to arrest Hyde, Stevenson gives a vivid description of "the dismal quarter of "Soho" where Hyde lives. What is it?

From the text:

The dismal quarter of Soho seen under these changing glimpses, with its muddy ways, and slatternly passengers, and its lamps, which had never been extinguished or had been kindled afresh to combat this mournful re-invasion of darkness, seemed, in the lawyer's eyes, like a district of some city in a nightmare.

As the cab drew up before the address indicated, the fog lifted a little and showed him a dingy street, a gin palace, a low French eating-house, a shop for the retail of penny numbers and twopenny salads, many ragged children huddled in the doorways, and many women of different nationalities passing out, key in hand, to have a morning glass; and the next moment the fog settled down again upon that part, as brown as umber, and cut him off from his blackguardly surroundings.