I've found 40 Kent Street in the 1871 census: RG10/598/103/10.
Disappointingly there are no familiar names there. Two families are at the address; one headed by Charles Gould, a chair maker, and the other by Peter Daley, a shoe maker. I cannot easily see relevant people in the vicinity either, though I can't guarantee they are not there (the enumerator's handwriting is challenging, to say the least!).