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YEARBOOK, PUBLIC MUSEUM, MILWAUKEE 



[Vol. III. 



places, for the walls and ceilings were very strongly blackened by fire. 

 Beginning at the northwest corner of room 1, and extending outward, 

 was a large natural fissure in the rock and at the point Z, there was 

 inserted in this fissure, a block of mud mortar, which apparently 

 formed a portion of a chimney, which conducted the smoke out 

 through this large fissure. The outer end of the fissure is shown in 

 figures 62 and 64. 



The two rooms were connected by means of a carefully made 

 opening through the wall, a detail view of which is shown in figure 

 65. It was sixteen inches in width by twenty-four in height and was 



Fig. 65. — Doorway and wall, Cape Royal rock shelter. 



provided above with a fairly heavy stone lintel and below with a stone 

 threshold of similar weight. The latter showed a very distinctive 

 groove, where implements, such as knives, celts or the like have been 

 whetted in times past. Both these rooms, upon excavation, showed 

 not only the remains of fireplaces and other evidences of their use as 

 habitations, but each yielded fragments of broken pottery and broken 

 bones. In room 2, in addition to the carefully laid floor of thin stones 

 and mortar, the following interesting objects were found: a bone awl, 

 one potsherd of black and white ware and many sherds of a dark 



