Lot Essay
The arms are for Richard Seymour-Conway who became 4th Marquess of Hertford in 1842 but significantly there is no coronet to denote his rank of marquess (in addition to his being Earl of Hertford, Earl of Yarmouth, Viscount Beauchamp and Baron Conway and a KG from 1846) so the seal may have been used by a younger brother while the succession was in flux between 1830-1860.