Outside the Pillars of Hercules the Phoenicians had only savage nations to deal with, and with these they seem to have traded mainly for the purpose of obtaining certain natural products, either peculiarly valuable or scarcely procurable elsewhere. Their trade with the Scilly Islands and the coast of Cornwall was especially for the procuring of tin. Of all the metals, tin is found in the fewest places, and though Spain seems to have yielded some anciently,[9102] yet it can only have been in small quantities, while there was an enormous demand for tin in all parts of the old world, since bronze was the material almost universally employed for arms, tools, implements, and utensils of all kinds, while tin is the most important, though not the largest, element in bronze. From the time that the Phoenicians discovered the Scilly Islands--the “Tin Islands” (Cassiterides), as they called them--it is probable that the tin of the civilised world was almost wholly derived from this quarter. Eastern Asia, no doubt, had always its own mines, and may have exported tin to some extent, in the remoter times, supplying perhaps the needs of Egypt, Assyria, and Babylon. But, after the rich stores of the metal which our own islands possess were laid open, and the Phoenicians with their extensive commercial dealings, both in the West and in the East, became interested in diffusing it, British tin probably drove all other out of use, and obtained the monopoly of the markets wherever Phoenician influence prevailed. Hence the trade with the Cassiterides was constant, and so highly prized that a Phoenician captain, finding his ship followed by a Roman vessel, preferred running it upon the rocks to letting a rival nation learn the secret of how the tin-producing coast might be approached in safety.[9103] With the tin it was usual for the merchants to combine a certain amount of lead and a certain quantity of skins or hides; while they gave in exchange pottery, salt, and articles in bronze, such as arms, implements, and utensils for cooking and for the table.[9104]