There was an Ethel 1876, Charles 1878 and Maria 1879, the latter in Salford
I was concerned about Swinton but checked the Lancashire BMD & FreeBMD but no luck, there are a number of Swintons, Swindons can get confusing I do know that they lived in Salford in later years
My reasoning so far is that when her daughter Sarah wife of John Richard Lee died in in 1936 age 62 the death cert said mother was a Shaw which blew me away so I started rechecking and found that there was a marriage in 1865 for a Savilla shaw to a George Richardson, they had 3 kids William born 1867 Savilla born 1869 and Harry born 1870 then Sarah was born a Coggin so around 1870 to 1873 she must have married George W Coggin
Savilla born 1869 married Walter Lee my Great Grandfather
Will check all what you said so far and see if it matches what I have - looks pretty good at present but the coggin-richardson marriage is still a mystery, reckon the enumerator cant spell Coggin