When did Margaret Georgiana Spencer's husband die?
John Spencer, 1st Earl Spencer John Spencer, 1st Earl Spencer (19 December 1734 – 31 October 1783) was a British peer and politician.
Jane Spencer, Baroness Churchill Jane Spencer, Baroness Churchill VA ("née" Conyngham; 1 June 1826 – 24 December 1900) was an English peeress and companion of Queen Victoria.