Question: When did Lord Herbert Montagu Douglas Scott's mother die?
Sentence (from "Louisa Montagu Douglas Scott, Duchess of Buccleuch"): In 1884, she became the Duchess of Buccleuch and Duchess of Queensberry, the wife of William Henry Walter Montagu Douglas Scott, 6th Duke of Buccleuch & 8th Duke of Queensberry.
Relevant evidence: No