Robert Dudley, Earl of Leicester by Steven van der Muelen, c.1560's. (Yale Center for British Art)

Robert Dudley, Earl of Leicester by Steven van der Muelen, 1565. (

Robert Dudley Earl of Leicester by an Unknown Artist, c.1575. (National Portrait Gallery, London_

Robert Dudley Earl of Leicester by an Unknown Artist, c.1575-80. (National Portrait Gallery, London)    NEW IMAGE

Miniature thought to Robert Devereaux Earl of Essex by Isaac Oliver. (Beauchamp Collection)

Copy of a woodcut of Robert Devereaux Earl of Essex by R. Boissard, 1600. (Victoria & Albert Museum)