This miniature is after the original full-size portrait of King George IV by Sir Thomas Lawrence, P.R.A., now in the Wallace Collection (inv. no. P559). It was thought by Lawrence to be his finest portrait of George IV. The King gave it to his mistress, Lady Conyngham.
A rectangular enamel of George IV by Joseph Lee after Sir Thomas Lawrence, signed in full on the reverse, was sold Sotheby's, London, 15 July 1974, lot 30.
For a biographical note on the sitter, see lot 160.