Question: What is the date of death of Mary Ann Black's husband?
Sentence (from "Mary Ann Black"): Mary Ann de Mestre (née Black) (1801–1861) was the wife of Prosper de Mestre (1789–1844) a prominent French-Australian Sydney businessman in the early 19th century; and the mother of Etienne Livingstone de Mestre (1832–1916)
Relevant evidence: Yes