Polished Stone 139 



been almost completely destroyed. Cannel coal could have been secured 

 at Flint Ridge, the nearest outcrop, or in West Virginia. 



A remarkable series of stone rings were found in Altar 1 . Fourteen 

 complete specimens were recovered together with several scores of 

 fragments. The largest is 6.5 cm wide and 1.75 cm thick, while the 

 smallest is 5.5 cm wide and 1.75 cm thick. In Plate LXXVII, Nos. 

 1-2, are shown two of the best specimens. It will be observed that 

 melted copper still adheres to one of them. Plate LXXVII, No. 3, 

 illustrates the ordinary form of these rings. "These rings are made 

 from varieties of what appears to be slate, some containing mica, one 

 apparently from the same material as one of the pipes from Altar 2. 



Fig. 34. 

 Bird Stone. 



One of them is evidently made from bituminous slate, the inside polished. 

 The exterior groove is much less finely finished than the rest of it or the 

 other rings. This shows marks of an implement, apparently of rough 

 stone, where the groove has been worked out. The groove shows 

 irregular depressions, also marks of the stone tool, running lengthwise, 

 but not parallel. This is the only specimen which shows marks of the 

 stone tool used in forming it before polishing." 



Plate LXXVII, No. 5, as described by Willoughby, shows "out- 

 lines of four rings, exhibiting symmetry of form. Some rings are not 

 pierced; some are pierced with four, and others with eight holes, always 

 in pairs placed opposite each other. The rings vary in size, the largest 

 being 6 cm in diameter. In several specimens, the drilling seems to 



