At the Hilton Mine in the Ontonagon district, in October, 1863, as the men were removing the vegetable mould that had accumulated in one of the old pits, they found at the depth of about nine feet a leather bag, which was eleven inches long and seven inches wide. It was lying upon a mass of native copper which the ancient miners had unsuccessfully attempted to remove from its parent vein. The bag was in a remarkable state of preservation, the leather being quite pliable and as tough as sheepskin. It was made up with the hair inside, was sewed across the bottom and up one side with a leather string, and near the top holes were cut and a leather string inserted to close the mouth by drawing it together. The bag was empty, but from its appearance I judged that it had been used for transporting copper or other mineral,--the leather in places showing marks of much service, and the hair being almost entirely worn off. I was unable to determine what kind of skin it was, but inclined to the belief that it was from the walrus, as the short, stubby hairs more closely resembled those of that animal than of any other with which I am acquainted. At the time I saw the bag,--the day after it was discovered,--it was in the possession of C. M. Sanderson, Esq., the agent of the Knowlton Mine; but I hear it has since been taken to Boston and sold. In several of the ancient mines considerable masses of pure copper detached from the main lode have been found, which were left there by those who mined it. At the Central Mine, not far from Eagle Harbor, a mass of copper was found in one of these old pits that weighed forty-six tons. Every portion of the surface was smooth, and appeared as though it had been hammered by those who detached it from its original vein. In the Mesnard Mine, in the Portage Lake district, a detached mass of copper was found that weighed eighteen tons, hammered smooth like the mass before named.