Question: What is the date of death of Harriet Bury, Countess Of Charleville's mother?
Sentence (from "Harriet Bury, Countess of Charleville"): She was the third daughter of Colonel John Campbell, 4th of Islay and of Woodhall, and his wife, the former Lady Charlotte Susan Maria Campbell, a daughter of John Campbell, 5th Duke of Argyll, and herself a writer.
Relevant evidence: Yes