EOBEET E. LEE MINE. 485 



about 25. Explorations on the dip to the northeast and northwest find the 

 ore more irregularly distributed throughout the horizon and not so concen- 

 trated as in the older workings ; nevertheless they indicate an extension of 

 ore deposition in that direction sufficient to justify more extended explora- 

 tions. In the early days no maps were made of the underground workings, 

 the services of surveyors being only called upon from time to time to deter- 

 mine points for the connection of drifts and fpr the location of shafts on 

 the surface. Those given on the map for this mine are the result of rough 

 surveys made by us in the course of our examination, checked by meas- 

 urements kindly given by the surveyors who had at various times been 

 employed in the mine. They represent only the principal drifts which 

 were in use at the time of examination, the intermediate ground being 

 largely occupied by stopes and drifts no longer used. 



The later workings are systematically conducted from two main levels, 

 the 320 and the 350 foot, the station of the former being 192 feet below the 

 collar of No. 2 shaft. The No. 4 shaft of the Lee claim, on the south side 

 of Little Stray Horse gulch, finds the iron body directly under the Wash. 

 As yet little attention has been given to this portion of the claim, although 

 it certainly deserves it, as from analogy with other parts of the hill it would 

 seem as likely that rich ore bodies should exist under the lee of the dike 

 here as there, and they might extend still farther eastward. 



Little sliver. On this claim, which lies next east of the Lee, a commence- 

 ment of exploration of the ore body has been .made, and very promising 

 ore deposits are being found. The Sliver shaft was sunk through about 

 one hundred and twenty-five feet of Wash to Gray Porphyry, and found 

 the usual thin bed of shales and sandstones at the contact of this with the 

 White Porphyry, which were here more or less replaced by iron vein ma- 

 terial. 



The Tip Top shaft, still further eastward, a little beyond the limits of 

 the map, found these shales, with a certain amount of carbonaceous material, 

 at a depth of 245 feet. In them were some small pockets of galena and 

 carbonate ore. . 



Southeast comer of region mapped. A considerable area still remains in the 

 southeast part of the region represented on the map, from which the ore 



