Note 2251 — THE CASSITERIDES, ICTIS, AND THE BRITISH TRADE IN TIN
Reading edition
W. C. Borlase, Tin Mining in Spain, 1898, p. 21.—‘In the island of Ons alone, near the mouth of the river Pontevedra ... some indications of tin-quartz were found, so Cornide tells us,’ &c. Ons is not one of the group of islands with which the Cassiterides have been identified.