Need direction

[cardiff]

Hi
Lilian Lloyd nee;Robinson Left South Wales around 1932-33 before she was married she worked at Selfridges in London believe to be an elevator operator, family believe she returned to the bright light of London and may have taken up another position at the store. About 15 years later a letter was sent from Lilian to her husband to ask if he had remarried! Lilian also said she was thinking of immigrating to canada to be with her sister. Her husbands mother who had cared for her daughter threw the letter in the fire! Lilian's daughter is still alive and in her 80's and it is her daughter that asked if I would look into what happened to her grandmother she never knew.
 They always believe she used her maiden name of Robinson. I did request info on Selfridge Stores employee info someone suggested I contact to the N Achives has the info is in private hands.
Thank you for your imput so far
cheers cardiff