Hi Valda
You are going to wish you hadnt asked! Here goes,
William Cooper and Mary McDonald are my gt grandparents. When I received the marriage certificate a couple of years ago I spent a long time eliminating all Mary McDonald's born in the Greenwich/Woolwich/Plumstead areas. I then when back to the marriage certificate and started on the two witness's, John and Emily Abbott. This led me to the Abbott family. I then assumed, like other of my family researches that this Mary Abbott, correct place and date of birth, had a change her surname on the remarriage of her mother. So I started working backwards. Elizabeth married John Abbott in November, 1852, Rotherhithe. You probably did not find her as she married under the name Dykes [discovered from Emily's birth certificate] . So she was not Charles Mcdonald's widow as I had expected but the widow of a Mr Dykes who I just cannot find. But what it did tell me was her father's name William McDonald. Realising Mary and Elizabeth could not be the children of either John or Elizabeth I started searching the 1851 census for a Mary and Elizabeth McDonald. The two children in the workhouse were the only ones most likely. I had moved my research to Surrey as I think this is where Charles was an apprentice in 1841, and may have died before 1851 as I cant find him. Phew!
regards, Pauline