That building to the left is really that close to the church. There are buildings like that on three sides. On the fourth side is a road so small that an American would never think it serviceable and then more buildings, giving the impression that the church is hemmed in on all four sides.
Here's the satellite view, although it does not give nearly as good an impression of the crammed-in nature of London.
He is also the author of the novel Chatterton, which contains the funniest depiction of an elderly novelist, Harriet Scrope. Her opening line, spoken to her cat Mr. Gaskell, is, "Mother would like to piss on all this and then she would like to burn it." She is speaking of her life.