Bisbee daily review., 1917-07-01
REMARKABLE SPEED MADE IN OPENING UP
 BLACK GIANT MINES
New Corporation Proceeding With Development of Rich Outcrop of Iron Gossan In The Harcuvar Range.
Special to the Review.)

speed that is truly unusual. the Black Giant Mines company, corporation less than three months old, is proceed ing with the development of the big gest outcrop of iron gossan and other copper indications in the Harcuvar range.
 Backed by a ysndicate of Mobile. Ala. capitalists who have advanced ample funds, the Black Giant company is making a record for rapid develop ment. A shaft has been sunk nearly 100 feet by hand and by the first of July air drills will be in operation. A hoist is already in service and all necessary camp buildings have been erected. all within 60 days.
 The shaft is started in the country rock, a sort of micacious schist. At depth of approximately 800 feet it will intersect ledge of iron gossan, specu- lar iron. limonite, manganese and quartz. which is at least 150 feet wide and can be traced for more than a mile. Then a drift will be run back under hill to the mouth. gaining a depth of 1,250 feet from the apex, where the ledge crops bigger and stronger than anywhere else.
 Look for Big Strike.
 Mining men and geologists are agreed that if the Black Giant com pany strikes a body of copper ore it will be something immense. In this region specular iron usually is replaced by copper at depth. It is believed that at one time the Black Giant ledge was all copper ore on the surface but the values have leached down. with the exception of few small pieces of cop per carbonates.
 It was by following downward a much smaller ledge of similar charac- ter that E. A. Stent and George A. Eas- ton made the Critic. about two miles southwest of the Black Giant, one of the richest little mines in Arizona. Stent and Easton hold the Critic un- der a long-term lease from the owner George B. Layton, New York bank er Easton is actively in charge and he operates the mine under a sub-leas- ing system. A carload of high grade gold-copper ore is shipped each week to the Humboldt shelter and eaca car nets from S3.5OO to S4.50O, after all costs of mining. transportation and treatment are paid. Nearly all the ore now being extracted comes from the 3OO-ioot level. The Critic is not de- veloped below 400 feet.
 Leasers Make Cleanup.
 A few days ago two sub-leasers who had been working in one part of the mine for six months, split S4O,0O0 be- tween them and went to the coast to spend their wealth. Frank Lucas, for mer owner of the Black Giant claims, has secured lease on their drift and will drive it about 150 feet to the east, where it will enter one of his own Critic Extension claims.
 The Black Giant and Critic are in the Cunningham pass section of the Harcuvars. Other companies operat- ing with marked success in the pass are the Black Reef. Wenden, Wenden Verde and Wenden King. The Wen den is backed by Globe people. some of whom are associated with the Old Dominion. w. N. Ormsby is in charge as superintendent and he is now sink ing the main shaft below the 225-foot ovIO de aNf ola and other copper ores have been taken from the workings at 125 and 225 feet. but the company is now striving to gain depth. where the ore shoot prob- ably widens from two or three feet to five or ten.
 Cobrita Verde.
 Some four miles west of the Critic, in the Tank pass regoin. lie the Co brita and Cobrita Verde. The Cobrita has been under development about a year and seems in a fair way to be- come a big mine Two carloads of high grade black sulphide. running 22 per cent copper and around SEQ ton in gold. were shipped from drift tun- nel near the top of the hill. A two compartment shaft has been sunk to a depth of 200 feet in the wash below. At the bottom the ledge has widened to 20 feet is blue slaty schist and scanned with cholcopyrite. Just a little water is making. and it is believed that at water level the seams all come to- gether and make solid body of ore. A drift is being run under the hill, where it will gain a depth of $50 feet or so. and the shaft is to be sunk to water level.
 The Cobrita is well equipped with a 25-lEorsepower hoist. four-drill compress o... ..a tho cl,f,,,~,~ rf,t,, R,krfto