On the other hand, the celebrated Ju Chou ware of the Sung dynasty, which aspired to equal the Ch´ai in colour, was evidently of the grey green celadon type, with perhaps a tinge of blue like the early Corean wares.[86] We have, then, two theories on the nature of the Ch´ai glaze: (1) that it was an opalescent, turquoise glaze, such as is seen on the Chün type of wares; and (2) that it belonged to the smooth grey green celadon class, with the bluish tint strongly developed. There may be other theories[87] besides, but it matters little, as no authentic specimen is known to exist. In fact, the discussion under the circumstances would have but little interest were it not for its bearing on some of the Sung wares, which will be discussed in the next chapter. FOOTNOTES: [Footnote 41: No doubt this mortuary pottery was made locally to supply local needs, and there is no occasion to refer it to any of the better known pottery centres, though we do find mention of an imperial order for sepulchral ware sent to the potters at Hsin-p´ing (the old name for the district town of Ching-tê Chên) in the T´ang dynasty. See _T´ao lu_, bk. viii., fol. 2, quoting from the _Hsiang ling ming huan chih_.] [Footnote 42: See _A Glossary of Reference on Subjects Connected with the Far East_, by H.A. Giles, Shanghai, 1900. "The practice among Chinese women of cramping the feet is said by some to have originated about 970 A.D. with Yao Niang, concubine of the pretender Li Yü. The lady wished to make her feet like the new moon. Others say that it was introduced by Pan Fei, the favourite of the last monarch of the Ch´i dynasty, 501 A.D."] [Footnote 43: See the _Toyei Shuko_ (Illustrated Catalogue of the ancient Imperial Treasure called Shoso-in, by Omura Seigai, Tokyo, 1910), Nos. 154, 155 and 156.] [Footnote 44: Another common characteristic of the T'ang base is a central ring, or one or two concentric circles incised on the wheel.] [Footnote 45: Laufer (_Jade_, p. 247) sounds a note of warning about the reconstruction of many of the T'ang figures. They were very frequently broken in the course of excavation, and when a head was missing its place was commonly supplied from another find. Another and more serious warning is given by F. Perzynski in the _Ostasiatischer Zeitschrift_, January to April, 1914, p. 464, in an article describing forgeries of coloured T'ang figures, and vases and ewers with mottled green and yellow glazes, in Honan Fu.] [Footnote 46: _Ruins of Desert Cathay_, vol. ii., p, 195. Similarly bowls with spotted glaze are indicated in several of the silk pictures found by Sir Aurel Stein at Tun-huang, which are temporarily exhibited in the King Edward VII. galleries in the British Museum.] [Footnote 47: Fragments of similarly glazed ware were discovered by Sir Aurel Stein on sites in Turfan, which were supposed to be of T'ang date (see p. 134).]