Book: Cushion, J. P. & Honey, W. B. 1980 Handbook of Pottery and Porcelain Marks.
• Mark illustrated: p. 159Book: Godden, Geoffrey A. 1968 Minton Pottery & Porcelain of the First Period 1793- 1850.
• Information on the use of bone ash at Minton: pp. 5- 6