68 arsenopyrite, pyrrhotite, and chalcopyrite. Southwest of the limestone body the fault is somewhat split up, but none of the branches contains any vein filling nor shows evidence of mineralization. At elevation 5,525 feet, an adit drift follows the calcite vein for 235 feet in a southwest direction. The limestone body is encountered 200 feet from the portal and continues along the south side of the vein fissure for 30 feet. The limestone is replaced by sulphides along the fault as at the surface 125 feet above. The percentage of sulphides present varies considerably from place to place, ranging from 8 or 4 per cent up to 95 per cent of the mass. In general sphalerite is the predominant mineral, and is accompanied by small amounts of galena, arsenopyrite, pyrite, pyrrhotite, and chalcopyrite. The heaviest mineralization occurs east from the fault, along the east edge of the limestone body. A 20-foot crosscut driven southeast along this contact, with a 10-foot winze sunk from the end of it, discloses continuous mineralization with several irregular-shaped replacements of almost solid sulphides. A representative sample of the ore, containing about 10 per cent of sulphides, collected at the intersection of the drift and the 20-foot crosscut, assayed: gold, 0-01 ounce a ton; silver, 6-29 ounces a ton; lead, 2-04 per cent; zinc, 3-50 per cent. Along the main drift the fissure vein ranges from 4 inches to 3 feet in width and shows wide variation in its mineral content. Near the portal it is 3 feet wide, consisting of brecciated andesite cemented by calcite, but containing no sulphides. At 25 feet from the portal it is mineralized with arsenopyrite over a width of 11 inches. At 40 feet from the portal the vein consists of 4 inches of solid sulphides, largely sphalerite with some galena, arsenopyrite, and tetrahedrite. From there to the limestone replacement ore-body the vein ranges up to 8 feet in width, but in most places contains only small veinlets and replacements of sulphides. West of the limestone the vein pinches, and it is barren at the face of the drift. At elevation 5,445 feet an adit is driven 46 feet along the silver-lead vein. For 20 feet from the portal the vein ranges from 6 to 12 inches in width. It consists of brecciated andesite cemented by calcite and contains about 3 per cent of galena with a little pyrite and arsenopyrite. Beyond 20 feet the vein splits and the adit follows the smaller of the two branches. This branch narrows to 3 inches towards the face and is only sparsely mineralized. The vein is exposed for about 25 feet below the adit down the face of a steep bluff and then disappears under a long talus slide. Immediately above the talus, the vein consists of 6 inches of sheared andesite replaced by about 5 per cent of arsenopyrite. A 6-inch channel sample of this material assayed: gold, 0-12 ounce a ton; silver, 36-89 ounces a ton. On the southeast part of the Copper Queen claim there is a mineralized sheared zone in the granodiorite stock. The vein strikes north 80 degrees east and dips 838 degrees north. It ranges from 2 to 4 feet in width and can be seen to continue along the surface for about 200 feet. The sheared and altered rock is traversed by small sulphide stringers and seams consisting of pyrite, arsenopyrite, and pyrrhotite. A. 12-inch channel sample taken across the central part of the vein at the portal of the adit assayed: gold, 0:15 ounce a ton; silver, 2-86 ounces a ton.