History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c12.s1.t2.4

v1.c12.s1.t2.4

Copper is recorded to have been transported down the Subarnarekha river to Piple situated at its mouth which had copper as one of its chief exports. An old road used by the Chinese is said to have existed in Emperor Ashok’s time from the Subarnarekha river east of Ghatsila to Tamluk on the Rupnarain river and the mining of this area has been credited to Chinese.