The ‘Jersey Portrait’ of Queen Katherine Parr will go on sale at Sotheby’s in July. At one time the portrait was thought to be of Lady Jane Grey.
Katherine Parr: Henry VIII’s wife’s portrait and letter go on sale
You can read analysis of the portrait in Stephan Edward’s book, A Queen of a New Invention: Portraits of Lady Jane Grey Dudley, England’s ‘Nine Days Queen’ and analysis by Lee Porritt at the Lady Jane Grey Revisited website.