Question: What is the date of death of Harriet Bury, Countess Of Charleville's mother?
Sentence (from "Harriet Bury, Countess of Charleville"): Her "A Journey to Florence in 1817", a travel diary written when she was seventeen years old and visited the city with her family, was published in 1951, after a copy was found in a bookshop in London.
Relevant evidence: No