Question: When did Catherine Douglas, Baroness Glenbervie's husband die?
Sentence (from "Sylvester Douglas, 1st Baron Glenbervie"): Sylvester Douglas, 1st Baron Glenbervie of Kincardine PC, KC, FRS, FRSE, FSA (24 May 1743 – 2 May 1823) was a British lawyer, politician and diarist.
Relevant evidence: Yes