Literature: Dr Chris Girton, The Two Quail Pattern; Simon Spero, Lunds Bristol and Early Worcester Porcelain 1750-58; Stephen Hanscombe, Jefferyes Hamett O~Neale, China Painter and Illustrator; Henry Sandon, Flight and Barr Worcester Porcelain 1783-1840; Aileen Dawson, The Art of Worcester Porcelain; and 19 other books and catalogues on English porcelain. (24)