To the pursuit of such trading the Britons, according to Mr Tylor, were the more inspired by a desire to obtain, in return for their metals the amber which, as the favourite ornament of prehistoric times, then constituted a most important article of commerce, but was obtainable only in the north of Europe. {7}The early importance of amber in Europe is proved, Mr Tylor says, by its presence in many parts of Europe throughout the long neolithic age, and, therefore, long prior to the bronze age; and it was mainly to facilitate the exchange of metals for this much-desired amber that the Britons made roads or tracks from the high grounds which they generally chose for their habitations (thus avoiding alike the forests, the fens and the marshes), down to the ports from which the metals were to be shipped to their destination. Mr Tylor says on this point:-- "The first British tin-commerce with the Continent in prehistoric times moved, either on packhorses or by chariots, in hilly districts, towards Essex, Norfolk, and Suffolk, that is, in the direction from west to east; then by sea from the eastern British shipping ports, of which Camulodunum on the Stour, close to the Thames (Colchester) is a type, to the Baltic. Thus at first the 'tin' used to find its way partly by land and partly by sea from Cornwall to the mouths of the Elbe and Vistula, there to meet the land caravans of the Baltic amber commerce from the north of Europe to the south.... When the land route throughout Gaul was established the tin had to go across the English Channel, not to Brittany, across the rougher and wider part, but to Normandy. The Isle of Wight was nearer Normandy, and a suitable entrepôt for the coasters meeting the fleets of ocean trading ships.[1]... "Iron and lead were, also, valuable British productions, and could easily reach the Isle of Wight by coasting steamers or by the British or Roman roads via Salisbury or Winchester.... "All ancient roads to British shipping ports were, of course, British.... Without roads it would be impossible to get over the low, often clay, grounds, or to reach the seaports in chariots, as the seaports were constantly in the clay.... It was impossible to reach the shipping-ports, which are all at low levels, without roads, as the clay and sand would be impassable for chariots. Of course packhorses could travel where chariots could not, but if the main roads were made for chariots they would be equally good for packhorses." Mr Tylor thinks there is the greater reason for assuming that a considerable trade had thus been developed between {8}Britain and the Continent because Tacitus alludes to a British prince who had amassed great wealth by transporting metals from the Mendips to the Channel coast; but our main consideration is the evidence we get of the fact that Britain's earliest roads appear to have owed their origin to the development of Britain's earliest trade.