158 
Plate XV 
Whetstones 
Figure!. Grindstone made of sandstone. Shell-heap D. Cat. No. VIII-B-569. (Page 54.) 
Figure 2. Plough grinder made of mica schist. Shell-heap A. Cat. No. VIII-B-1220. 
(Page 55.) 
Figure 3. Whetstone with offsets in edge, made of argillite. Shell-heap A. Cat. No. VIII- 
E-1052. (Page 55.) 
