History of the Toba (Tungusic) Dynasty of North China (Google Books ⧉, Amazon ⧉, Bookshop ⧉)

The Travels of Marco Polo

The character T’ou 鍮 does not appear in the old dictionaries; its first appearance is in the History of the Toba (Tungusic) Dynasty of North China. This History first mentions the name ‘Persia’ in A.D. 455 and the existence there of this metal, which, a little later on, is also said to come from a State in the Cashmeer region.