Weekly National Intelligencer

Great Mineral Discovery.--The Dubuque Herald gives a glowing account of a recent discovery of lead ore, about three miles from that town, by Mr. Thomas Levins. The editor has been down into the mines, one hundred and twenty feet below the surface of the earth, and he tells, with great minuteness, what he saw there. The extreme length of the subterranean vault is something like one hundred and sixty feet by sixty, and varying in height from ten to sixty and seventy feet. It was discovered about six months since, and since then one million pounds of ore have been taken from their hiding place, and scarce more has been done than to remove what hung upon the encrusted wall, or laid exposed to the eye, or slightly buried beneath the floor of the cavern. The Herald says $28,000 is the reward of this bare skimming of the surface, while the testimony of experienced miners is, that the vast reservoir of wealth is as yet entirely undisturbed.