Bisbee daily review., 1904-05-24

the ground. which was immediately l undertaken Work progressed very rapidly and with very moderate cost. considering the situation. The result | was that at about 400 feet a change in the formation occurred
 Iron pyrite was encountered in this change of ground, and progress made some little distance into 1t before its true character was thoroughly appre-
 ciated, when it was discovered on close inspection that limestone was l largely replaced with iron pyrites of very finely divided character. Fur ther on this pyrite became of coarser
 texture, and while the full bearing ot
 the mine of the mineralized limestone
 has not yet been determined in the 1 Warren Mining district, what its in
 fluence on the ore bodies would be
 could not be foretold at the time it
 was encountered, nor has the question
 yet been fnlly determined by work
 done on your property.
 During the progress or this work
 work was undertaken in the upper
 tunnel just below the cliffs. A winze
 was started upon the crossing of the
 two faults, where there was some min
 eralizatiol containing copper. The
 winze proceeded 50 feet, when the
 faults closed up to mere seems in
 the rock and bottomed in solid lime
 stone It had been hoped to connect
 this with the lower Higgins tunnel,
 and furnish ventilation for doing wora
 in the lower Higgins tunnel. but il
 would have been of such depth that
 under the circumstances it was not considered as good a prospect as go ing further in the tunnel and put ting down an inclined winze. Such a winze was started after driving the tunnel in five or six feet further than the old breast The progress at first
 was slow, as everything had to be carried up to the place and hand drills were used at first. but as the depth was increased on an angle of
 45 degrees it progressed into a con siderable body of carbonate of copper. But on course of 45 degrees it threatened to override the ore body, and later the winze was brought back
 to 70 degrees and pushed on through 10 direct cone connection with the drift that had meanwhile been start ed in the lower tunnel. leaving the iron formation at about 40 feet deep
 from the top of the winzes and was
 continued to completion. The idea
 was and is to attack at different points 1 in a cumulative manner the develop ment of the iron ore encountered dnr ing the week. The winze furnishes a means of disposal of the waste mat.
 ter without hoisting. permitting a very much smaller force of men and a greatly decreased cost. It also venti- lates the lower tunnel The length of the winze was PIT feet.
 Meanwhile an extension from the old Higgins tunnel was carried out southeasterly. and upon encountering
 water courses, iron ore and altered limestone it was turned more directly
 across the formation and toward the
 south. The total length of this cross
 cut was 491 feet, terminating near the south line of the Twilight claim. Im- | mediately from the turn, and extend 1 ing i0 10 50 feet south, this tunnel cut { material that is considered drought | out this district as being a very good indication, that is. no company operat- ing in the district would consider the formation cut here as any other than indicative of altered and possibly min
 eralized ground in the vicinity. The
 general inference would be that min eralizaticn is beneath it However. the 300 foot drift of. the Higgins goes
 through south. 900 feet lower. without
 any favorable indication of any de
 scription. Drifting and sinking. in | feet, are as follows:
 | Sinking