Next let us take the following passages, both of which are taken from Posidonius. “Posidonius says (in reference to Spain) that the tin is not found on the surface, as many authors have alleged, but is dug up; and that it is produced among the barbarians above Lusitania, and also in the islands called Cassiterides. And that from the British Isles tin is carried to Marseilles” (Strabo, iii, 147). Diodorus (v, 38) is beyond doubt quoting from the same authority when he writes: “Tin likewise is found in many parts of Iberia, not being found on the surface, as some have alleged in their accounts, but being dug up and smelted, just like silver and gold. For above the land of the Lusitanians there are many mines of tin along the little islands which lie in front of Iberia in the Ocean, which are called from the circumstance Tin Islands. Much is likewise conveyed across from the British Island to Gaul, which lies right on the opposite side, and is conveyed on horses through the interior of Gaul by the traders to the Massaliotes, and the city called Narbo. The latter is a Roman colony, and, on account of its favourable position and wealth, is the greatest trading centre of all the cities in these parts.” These two passages are valuable (as Mr. Elton has pointed out, p. 37) “as showing the distinction which was known to exist between the Cornish tin trade and the commerce with the Cassiterides, which was of a much higher antiquity.”
Let us now observe that when Strabo, writing as a contemporary, is describing the exports from Britain, he omits the mention of tin, whilst from the extract from Posidonius, quoted alike by him and Diodorus, it is plain that when the Stoic explorer visited North-Western Europe the British tin trade was still of importance. From the quotation from Diodorus we learn also that the tin passed to two different marts on the Mediterranean littoral, Massalia
as Mr. Elton takes it, “the junction of the Rhone and Sâone, where the wharves for the tin-barges were erected.” What is the authority for the last statement?
