Explanation of Plate IX. 



Fig. 1. A view of the Concannon ridge looking southeast. The 

 entrance to the cave is just to the left of the tree, which shows against 

 the bank below the northwest (or nearest) corner of the house. The 

 highest point on this ridge toward the south is about 180 feet above the 

 mouth of the cave. (See p. 350). 



Fig. 2. A view along the Concannon ridge, looking west of south. 

 The cave is at the northern base of the ridge to the right. (See p. 350. ) 



