Note: A bowl of the same pattern and shape, formerly in the H. J. Oppenheim Collection, is illustrated by R. L. Hobson, The Wares of the Ming Dynasty, London, 1923, pl. 27 (top). Another example is illustrated in The 15th Anniversary Catalogue, Idemitsu Museum of Arts, Tokyo, 1981, p. 197, no. 811. An aubergine, green and yellow-decorated example is illustrated in Chinese Porcelain: The S. C. Tianminlou Collection, Hong Kong, 1987, Part I, p. 118, no. 70, where it is noted that square bowls of this type were popular during the Jiajing period and were decorated with other designs and color schemes, but their popularity declined after the Wanli period.