"But.the most astonishing of all recent dis coveries was that made last week of perhaps the richest lead mine iv the world. The spe cimens are aH of extreme richness, and some ! weigh considerably over a pound. With no other tools than a pocket-knife and a stick, they dug out such quantities of the ore that they could not carry it away. One lump, ap parently nearly pure, and giving the appear ance of having been subjected to smelting heat, from the description, weighed twenty pounds or upwards.