celadon wares which was carried on briskly between China and the West in the Middle Ages, but enough has been said to give some idea of the extent and nature of the trade, which was mainly in the coarsest types of ware. Apart from the unlikelihood that very fine or precious porcelains would be embarked on such long and hazardous journeys, there was actually a law in force in China as early as the eighth century[187] which forbade, under penalty of imprisonment, the exportation of "precious and rare articles," anticipating by a thousand years the restrictive legislation of the Italian Government. [Illustration: Plate 22.--Vase of Lung-ch´üan Porcelain. With grey green celadon glaze of faint bluish tone, peony scroll in low relief. Probably Sung dynasty. Height 19½ inches. _Peters Collection._] FOOTNOTES: [Footnote 154: See _T´ao lu_, bk. vi., fol. 4. A factory of inferior reputation is supposed to have existed at the neighbouring village of Chin-ts´un (see Hirth, _Ancient Chinese Porcelain_, p. 38). And the _T´ao lu_ (bk. vii., fol. 6) describes a factory at Li-shui Hsien in the Ch´u-chou district, whose productions were also known as Ch´u ware.] [Footnote 155: In the _T´u shu_, bk. ccxlviii., section _Tz´ŭ ch´i pu hui k´ao_, fol. 13, we are told that the brothers Chang worked beneath the Han liu hill at Lung-ch´üan in the Sung and Yüan dynasties.] [Footnote 156: _T´ao shuo_, bk. ii., fol. 12 recto.] [Footnote 157: _Ts´ui_ has already been explained as meaning "kingfisher: a bird with bluish green plumage." That it also connotes the idea of a green colour is shown by the expression _ts´ui yü_, which is rendered in Giles's Dictionary, "emerald green jade."] [Footnote 158: Author of the _Ch´un fêng t´ang sui pi_, quoted in the _T´ao shuo_, bk. ii., fol. 12.] [Footnote 159: Bk. vii., fol. 24 verso.] [Footnote 160: Two examples in the Gotha Museum were figured in the _Burlington Magazine_, June, 1909, Plate iv.] [Footnote 161: See _T´ao lu_, bk. iii., fol. 12 verso.] [Footnote 162: Bk. vii., fol. 7 recto.] [Footnote 163: [Chinese]] [Footnote 164: _T´ao lu_, bk. vi., fol. 6.] [Footnote 165: See Hirth, _Ancient Chinese Porcelain_, p. 31.] [Footnote 166: See Bushell, _Oriental Ceramic Art_, p. 150.] [Footnote 167: A large number of fragments and wasters, besides a few complete specimens, found on the site of these potteries, about 200 miles north of Bangkok, are now in the British Museum. The prevailing type of ware has grey porcellanous body and a thin transparent glaze of watery green celadon colour, often distinctly tinged with blue.] [Footnote 168: [Chinese] See _T´ao lu_, vol. vi., fol. 3.] [Footnote 169: Bk. vii., fol. 22.]