The remains of the tinners have not been subjected to as full an exploration as they merit, but certain results have nevertheless been reached. One thing is abundantly clear, that all the tin-streaming was done subsequently to the time when men occupied the hut circles. The population living in them knew nothing of tin.
Diodorus Siculus, who wrote B.C. 8, says that the dwellers at Belerium, a cape of Britain, mined and smelted tin. "After beating it up into knucklebone shapes they carry it to a certain island lying off Britain, named Ictis, for at ebb tides, the space between drying up, they carry the tin in waggons thither ... and thence the merchants buy it from the inhabitants and carry it over to Gaul, and lastly, travelling by land through Gaul about thirty days, they bring down the loads on horses to the mouth of the Rhine."
There can exist little doubt that Ictis is the same as Vectis, the Isle of Wight. It is held that anciently the island was connected with the mainland. The Roman station and harbour was at Brading. The early workers first pounded the ore with stone crushers, and such have been found. They then fanned it in the wind, which carried off the fine light dust, and left the metal on the shovels on which they tossed the ore and grit into the air. Beside some of the workings heaps of this dust have been detected. The washing of the ore came later. When sufficient had been collected, long troughs were sunk in the "calm," or native clay, and these were filled with charcoal; then the tin ore was laid on this charcoal, and either more of this latter was heaped above, or else peat was piled up, with layers of ore. Finally the whole was kindled. No bellows were used, but a draught through the channel kept the whole glowing, and the metal ran through the fire into the bottom of the hollow, or ran out at the end, as this rude furnace was constructed on an incline.
In Staffordshire, at Kinver, and in the neighbourhood of Stourbridge, in Worcestershire, I have seen banks and hedges made up of what are locally called _burrs_. These consist of masses of sand and iron slag, two feet in diameter, round, and concave on one side, convex on the other. These burrs were formed in the primitive manufacture of iron, which much resembled that of tin. Andrew Yarranton, in _England's Improvement by Sea and Land_, 1698, says that he saw dug up near the walls of Worcester the hearth of an old Roman iron-furnace.