This is what I could find about her - from a Wikipedia article about her husband, "Lord Stuart de Rothesay married Lady Elizabeth Margaret, daughter of Philip Yorke, 3rd Earl of Hardwicke, on 6 February 1816. They had two daughters
- Hon. Charlotte Stuart (1817–1861), wife of Charles Canning, 1st Earl Canning.
- Hon. Louisa Anne Stuart (1818–1891), wife of Henry Beresford, 3rd Marquess of Waterford.
Between 1831 and 1835 Lord Stuart de Rothesay constructed Highcliffe Castle at Highcliffe, Dorset. The estate had previously been sold by his father. Lord Stuart de Rothesay died in November 1845, aged 66, when the barony became extinct. Lady Stuart de Rothesay remained a widow until her death in June 1867."
Upgrade image posted 12 November 2014 from gac.culture.gov.uk/work.aspx?obj=24155.