Cf. E. M. Stern and B. Schlick-Nolte, Early Glass of the Ancient World, 1600 B.C.-A.D. 50, Ernesto Wolf Collection, Ostfildern, 1994, nos 131-132; and S. Auth, 'Mosaic glass mask plaques and the ancient theater', Journal of Glass Studies 41 (1999), pp. 51-72; and C. Insley Green, 'A group of Egyptian mosaic glass inlays dating from the Third Century B.C. to the 1st Century A.D.', A. Leahy and J. Tait (eds.), Studies on Ancient Egypt in Honour of H. S. Smith, London, 1999, p. 147-149; and exhibition catalogue, Ancient Glass in the Miho Museum, Kyoto, 2001, pls 101-104 for complete examples.