Question: When did Lord Herbert Montagu Douglas Scott's mother die?
Sentence (from "Louisa Montagu Douglas Scott, Duchess of Buccleuch"): She was the paternal grandmother of Princess Alice, Duchess of Gloucester and of Marian Louisa, Lady Elmhirst, as well as the maternal great-grandmother of Prince William of Gloucester, Prince Richard, Duke of Gloucester and great-great-grandmother of Sarah, Duchess of York.
Relevant evidence: No