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YEARBOOK, PUBLIC MUSEUM, MILWAUKEE 



[Vol. III. 



six inches in height at the rear. A space of about a foot by a foot 

 and a half at the front of this room was provided with a flat roof, made 

 by resting three horizontal sticks on the side walls, on which were laid 

 thin flat slabs of stone, covered by a layer of mud mortar, thus form- 

 ing a practically air-tight roof. The front and roof of this structure 

 are shown in figure 54. 



Room 10. This storage room measured three and a half feet long, 

 three feet in depth and onl}' fifteen inches in height. Its door, 

 which was very carefully formed, was only seven inches in width by 



Fig. 54. — Front and roof of Room No. 9, Upper Ribbon Falls cliff ruin. 



nine inches in height. It also had a small section of roof made on a 

 slant and with small thin stones, set on edge into the mortar to rein- 

 force it. This roof is shown in figure 55. 



Room 11. It seems probable that in front of rooms 8, 9 and 10, 

 there must have been a corresponding set of living rooms. This space 

 is designated on the plat as room 11. Owing, however, to the steep- 

 ness of the slope of the rock base here, this may not have been practical. 



Room 12. At a level about twelve feet lower than room 10, is a 

 large compartment, twenty feet long, by twelve feet wide. The walls 

 of this room are almost completely gone, but their outline is easily 



