On ivory, in a rectangular gilt-metal mount and frame with fitted red morocco case, 9.2cm. Signed, inscribed and dated 1842 on the reverse.
William Stephen Poyntz of Cowdray Park was the father of Isabella, wife of Brownlow, 2nd Marquess of Exeter (1795-1967).
The artist William Egley, received no professional training, but exhibited widely throughout his life, including at the Royal Academy.
He was considered to be particularly successful in his portrayal of children.