Richard Seymour Conway was the eldest son of Francis Charles, 3rd Marquess of Hertford, and Maria Fagniani. During his father's lifetime he was styled Earl of Yarmouth, hence the coronet in the stamp. A Captain in the army, he succeeded to the marquisate in 1842, and soon after settled in Paris. He was made a Knight of the Garter in 1846, and a Commander of the Légion d'honneur in 1855. A great collector of pictures and works of art, he left his collection to Sir Richard Wallace, and it now forms part of the Wallace Collection at Hertford House in London. He never married, and the title passed to a distant cousin, Francis George Hugh Seymour.