Thanks Frank. I've you looked at the Stanford Maps from 1872? The search feature's a bit limited, so I'm struggling to find relevant locations. Nonetheless, looks like another excellent resource: http://london1872.com/stanford37.htm
Didnt have this one so great.
It shows Bakers Row as such in 1872, so still not clear how church street becomes Church Row, again possible misreporting.
And additionally no sign of a Campbell Street, so josh is probably correct it was a mistake by the reporter.
A possibility is that Mizen did not take Cross and Paul seriously,and had no intention of doing anything in relation to what was said,or of asking questions and taking names.However,to be absolutely sure,after finishing knocking up,he made a quick trip to the junction of Bucks Row,and seeing activity there,joined in.The question then was,how to explain his presence,his absence from his beat,and his failure to question Cross/Paul,and the simplest explanation w as to claim that the two Carmen had simply told him he was wanted by an officer in Bucks Row,or words to that effect,not that a woman might be dead.
And saying this you have to ignore all the problems with such an idea pointed out by David Orsam.