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- British and European Portrait Miniatures Welcome to 111. Richard Cosway R.A. An important portrait of Lady Anna Horatia and Lady Charlotte Maria Waldegrave. Signed and dated in full on the reverse 1789. Provenance by family descent and to Dr. A. Dreesmann. 'As leading dealers in the field of PORTRAIT MINIATURES our stock is both of the finest quality and comprehensive. We have examples of ...www.portraitminiatures.co.uk