Did Karl Marx and Friedrich Engels misrepresent the slums of Manchester?

Was it intentional or a human mistake?

"Work, shopping, church and the pub kept different classes apart far more than ‘residential segregation’ in 1850s Manchester, undermining key assumptions about the Industrial Revolution.

By mapping digitized census data, new research shows that many middle-class Mancunians including doctors and engineers lived in the same buildings and streets as working-class residents including weavers and spinners. ...

But even in Ancoats, the main working-class slum which so appalled Engels, around 10% of the population belonged to the wealthier employed classes. ...

Friedrich Engels, the co-founder of Marxism, visited Manchester in 1842 and began recording examples of rampant inequality in the rapidly industrialising city.

He described a commercial core encircled by ‘unmixed working-peoples’ quarters, then the ‘middle bourgeoisie’ and further beyond, the upper classes. Many historians have relied on Engels’ account – preserved in The Condition of the Working-Class in England ..."

Mixed-up in Manchester "The ‘slums’ of Victorian Manchester actually housed doctors and engineers, a new study reveals, but daily life still kept rich and poor neighbours apart."

Life above and below street level in Manchester around 1838