According to the 1871 census, the man I was researching lodged at No 6 Feathers street at the time. He was in Dearham, Cumberland, near to where he was born, the decade before, and we think he died, possibly in a mining accident, before the 1881 census, as we've never managed to find hide nor hair of him from 1871 onwards.
(I didn't actually mention, if you check back, any number in my original post, as I've found from other researches how often street numbers are changed)
Thanks for your interest - it's truly amazing how people and things link up on here!
TY