"'Mr. Knapp, of the Vulcan Mining Company, has lately made some very singular discoveries here in working one of the veins which he lately found. He worked into an old cave which has been excavated centuries ago. This led them to look for other works of the same sort, and they have found a number of sinks in the earth which they have traced a long distance. By digging into those sinks they find them to have been made by the hand of man. It appears that the ancient miners went on a different principle from what they do at the present time. The greatest depth yet found in these holes is thirty feet: after getting down to a certain depth, they drifted along the vein, making an open cut. These cuts have been filled nearly to a level by the accumulation of soil; and we find trees of the largest growth standing in this gutter, and also find that trees of a very large growth have grown up and died, and decayed many years since; in the same places there are now standing trees of over three hundred years' growth. Last week they dug down into a new place, and about twelve feet below the surface found a mass of copper that will weigh from eight to ten tons. This mass was buried in ashes, and it appears they could not handle it, and had no means of cutting it, and probably built fire to melt or separate the rock from it, which might be done by heating, and then dashing on cold water. This piece of copper is as pure and clean as a new cent; the upper surface has been pounded clear and smooth. It appears that this mass of copper was taken from the bottom of a shaft, at the depth of about thirty feet. In sinking this shaft from where the mass now lies, they followed the course of the vein, which pitches considerably: this enabled them to raise it as far as the hole came up with a slant. At the bottom of a shaft they found skids of black oak, from eight to twelve inches in diameter: these sticks were charred through, as if burned: they found large wooden wedges in the same situation. In this shaft they found a miner's gad and a narrow chisel made of copper. I do not know whether these copper tools are tempered or not, but their make displays good workmanship. They have taken out more than a ton of cobble-stones, which have been used as mallets. These stones were nearly round, with a score cut around the tenter, and look as if this score was cut for the purpose of putting a withe round for a handle. The Chippewa Indians all say that this work was never done by Indians. This discovery will lead to a new method of finding veins in this country, and may be of great benefit to some. I suppose they will keep finding new wonders for some time yet, as it is but a short time since they first found the old mine. There is copper here in abundance, and I think people will begin to dig it in a few years. Mr. Knapp has found considerable silver during the past winter.'"]