Question: When did Margaret Erskine Of Dun's husband die?
Sentence (from "Archibald Kennedy, 1st Marquess of Ailsa"): Sir Archibald Kennedy III, 1st Marquess of Ailsa KT, FRS (February 1770 – 8 September 1846), styled Lord Kennedy between 1792 and 1794 and known as The 12th Earl of Cassilis between 1794 and 1831, was a Scottish peer.
Relevant evidence: Yes