Although Cæsar describes the natives of Britain as a hardy race of shepherds, whose simple wants were provided for in their own country, even then the commerce of Britain was of considerable importance; since the tin of Cornwall, and the hides of the vast flocks of cattle, had already induced the merchants of Phoenicia to visit and settle on our southern shores. They are believed to have supplied the Eastern world with Cornish tin, of such important use in the manufacture of bronze tools, weapons, and helmets of antiquity.[6] The principal and most ancient exports from Britain were, besides its famous tin, lead and copper; but lime and chalk, salt, corn, cattle, skins, earthenware, horses, staves, and native dogs, which appear always to have been held in great estimation, were also carried thence. The largest and finest pearls, too, are said to have been found on the British coasts; and the wicker baskets of Britain are celebrated by Martial and Juvenal as luxuries in Rome. And from Rome, the Britons received ivory, bridles, gold chains, amber cups, and drinking glasses. There are few remains of the ornaments in use amongst the Britons at a very early period: there are many relics, however, of that just preceding the Roman Conquest. We find torques or chains for the neck and wrists coarsely manufactured, like curb-chains. Beads were also in use. Many of the most ancient ornaments were cruciform. With the Roman Conquest came in the Roman ornamentation. This does not seem to have been modified by its introduction into Britain. The Romans imported Rome bodily into Britain, as was their custom in all the conquered countries, and the Britons were too uncivilized to make improvements on what was presented to them. For this reason it is that there is the greatest difficulty to distinguish between pure Roman and Anglo-Roman ornaments. That the Britons both understood and practised the art of working in metals, is ascertained from the relics of their weapons, as axes, spear and arrow heads, swords, &c. which are yet extant; and it is supposed that tin was the first ore which they discovered and refined. Lead they found in great abundance, very near the surface. The British iron was of uncommon occurrence, and was much prized, since it was used in personal ornaments, and was even formed into rings and tallies for money. This then precious metal has contributed more than any other to the greatness of England in those mighty works of our own times, her railways and vast ships of passage and war.