Yes Rosie, those are the deaths I'm looking at, although I don't have certs. I've found the burial for John Fishwick at Philips Park Cemetery, 62, a labourer, of 42 Leigh Street, Ancoats (?? - definitely begins with A). In the earlier censuses John was a Time Keeper at a cotton factory, but I suppose he may have turned to labouring later.
I can't see a burial for Mary, but the death you mention is the only likely looking one I've spotted.
Jane