MATCHLESS MINE. 481 



show, however, that both the Dunkin or northern ore body and the Lee 

 body, which is the main ore shoot of the hill, extend into it, and may be 

 reasonably expected to join together on this ground. Moreover, it has a 

 large extent of unexplored ground in the northeastern part of the claim, 

 which, though less promising than the southern part, is certainly worth 

 prospecting. 



The Discovery shaft and the Main shaft were sunk, the one to the 

 south, the other to the north of the continuation of the Dunkin ore shoot. 

 The Main shaft was sunk through 110 feet of Wash, 20 feet of White Por- 

 phyry, 15 feet of chert, 30 feet of iron, and through the underlying White 

 Porphyry to the Silurian formation, which it reached at a depth of about 

 two hundred and fifty feet. (See Section E.) In a drift on the top of the 

 iron body, several small layers of lime-sand were found immediately under 

 the overlying White Porphyry, which was itself much decomposed and full 

 of segregations of iron oxide The ore horizon, where cut by this shaft, 

 contained little or no pay ore, but where the Dunkin ore body was found 

 to extend to the Matchless line it was followed into the ground of the latter. 

 Here it has a width of about forty feet and is from eight to sixteen feet in 

 thickness. It extends in a northeasterly direction and descends rapidly to 

 the eastward. The vein material is a cherty or silicious iron, and the pay 

 ore a reddish clayey mass of sand carbonate,yielding much lead and silver. 

 At the time of visit no connection had been made between this ore body 

 and those to the east and south. 



The Leonard or southern shaft was sunk to strike the continuation of 

 the Lee body, which had been found to extend across the wedge-shaped 

 portion of the Hibernia claim, between this and the Lee ground. It was 

 sunk through 95 feet of Wash, 10 feet of ore, 15 feet of chert, and 12 feet 

 of quartzite to the underlying White Porphyry. As far as at present 

 explored, the rich ore body is confined to a narrow strip of ground along 

 the Hibernia and Big Pittsburgh lines. It lies upon the Parting Quartzite, 

 either directly or separated by a floor of chert, and therefore occupies the 

 very lowest portion of the Blue Limestone horizon. In the northeast corner 

 of the claim it abuts directly against the Gray Porphyry dike, which still 

 dips to the northward at a steep angle. Although narrow, the ore body is 



MON XII 31 



