I'm currently looking for what happened to Antonetta Trundley Browning, who disappears after 1871. She may have been married to my gt x 3 uncle Thomas, a shoemaker, who died in Wandsworth in 1876.
Thomas's niece, my gt grandmother Emma lost her first husband (another Thomas) on their 14th wedding anniversary, 1st May 1879. She appears on 1881 census with 2nd "husband" John Garvie and in June that year has their first baby in East Molesey. I can't find her 2nd marriage although its a very short window in which it would have taken place.
I've typed all that out from memory and can do similar with many other things. I don't give up - only recently after 10 years of looking, I found the marriage of my 3 x gt grandparents John Dunt and Kezia Seals in 1794, and Kezia's baptism (as Kezia Saul!) in 1773.