anthracite was brought in by sea, the ships landing on the beach near the mouth of the chyandour brook, which was outside the boundary of penzance and hence they did not have to pay harbour dues. the cargo was carried through the three tunnels under the railway line and hauled up the slipway to the smelting works. the works closed in 1912 and was demolished in 1930; some of the walls and crucibles can still be seen.