(C.)
The following additional localities of native copper, derived from sources entitled to respect, and accompanied, in some instances, by specimens of the metal, may here be given:—
1. Grand Menou, or Isle Royal, Lake Superior. Captain——, of the schooner——, in the employ of the Hudson's Bay Company, on Lake Superior, describes this island as affording frequent masses of copper. While becalmed off its shores in the spring of 1822, and, afterwards, in coasting along the island for a distance of one hundred miles, his men frequently went ashore, and never failed to bring back with them lumps of metallic copper, which they found promiscuously scattered among the fragments of rock. These were more abundant in approaching its southwestern extremity, where they unite in representing it to exist in a solid vein. Specimens of limpid quartz, chalcedony, and striped agate, were also brought to me from this island. [J. S. J. J.]
2. On the extremity of the great peninsula, called by the natives Meenaiewong, or Keweena Point, which forms so prominent a feature in the physiognomy of Lake Superior. It occurs in the detached form. [J. H. J. J.]
3. At Point aux Beignes, which is the east cape of the entrance into L'Ance Quewiwenon. A mass from this place was raised from the sandstone rock, which predominates there. [J. Y. B.]
4. At Caug Wudjieu, or the Porcupine Mountains, Lake Superior; in masses, enveloped with a green crust, along the banks of the Carp, or Neemaibee River, which originates in these mountains. [W. M. G. Y. J. J.]
5. On the banks of Lac Courterroile. This lake lies near the source of the River Broule, or Cawesacotai, which enters Lake Superior near La Pointe. It occurs in the alluvial soil, which is a kind of loamy earth, with pebbles intermixed, but of a rich quality, and timbered with beech and maple. It is found mostly in small, flat masses, more or less oxidated. [B. G. J. G. Y.]
6. In a vein on the shore of Lake Superior, between La Riviere de Mort and St. John's, a little to the west of Presque Isle. [J. J.]
7. On the northeast branch of the Ontonagon River. [J. H.]
8. In the precipitous bluffs called Le Portail, and the Pictured Rocks. A green matter oozes from the seams in these rocks, and forms a kind of stalactites, which is apparently a carbonate of copper. [G. Y.]