Hi Angela
 
Crossing-sweepers were essential in Dickens' London to enable pedestrians to cross the roads dry and relatively free of mud and filth.  The best-known crossing sweeper in Dickens's works is Jo in Bleak House, who is one of the key witnesses (although discounted at the time) at the inquest on Captain Nemo.  I cannot help identify "the black man that swept the crossing" but the job is one that Black people might have done.  Of course, he might have been black from the mud on the road with which he spent his working life in close contact, just as sweeps and their boys were black from soot.
 
Does this help at all?
 
Peter

Peter B Freshwater MA MCLIP FSAScot
43 Corstorphine Road, Edinburgh EH12 5QQ, Scotland
Telephone 0044 (0)131 337 7049
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