Londonderry Emerald Necklace & Earrings. Marquise daughter Amelia, Castle Ray Vicomtesse (1762-1829), then of her nephew from (died 1817) and his widow Caroline (1723-1793) 2nd Earl of Buckinghamshire, 7th Marquess to Rotian (1794-1844), which was hereditary and family to then current.
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