128 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 76 



different material. By learning the sources of the various types of 

 these ceremonial objects Mr. Baer hopes to discover some of the pre- 

 historic migrations of certain tribes of the American Indians. Many 

 interesting specimens of bannerstones were located in small private 

 collections in Pennsylvania. In one town there are nearly a dozen 

 which were found within a radius of lo miles. Unless this section 

 of the country was specially favored, bannerstones must have been 

 much more numerous than has heretofore been supposed. 



Numerous reports of a cache of rhyolite blades, ranging from 

 20 to 150 per cache, attracted ^Ir. Baer's attention to the source of 

 material in the South Mountains west of Gettysburg, Pennsylvania. 

 These prehistoric rhyolite quarries were discovered and described by 

 Prof. W. H. Holmes a number of years ago. Recently a trench for a 

 pipe-line was dug over the side of the mountain, which exposed 

 chips and reject blades of rhyolite and trap hammers for a distance of 

 half a mile. The bushels of rejects scattered along this narrow path 

 are indications of the magnitude of this prehistoric workshop, which 

 was as broad as it was long. 



