TUMULI. 



85 



them, doubtless, belong to the metallic period, some to that 

 of Stone, but it very rarely happens that we can attribute 

 any of them with reasonable probability to one period rather 

 than to another. This is particularly the case with ancient 



Fm. 99. 



Danish Cromlech. 



earthworks and megalithic temples or circles ; the barrows, 

 or Lows, on the other hand, frequently contain objects 

 from which some idea of relative antiquity may be ob- 

 tained. These ancient burial-mounds, of which several 



FIG. 100. 



Sepulchral Stone Circle. 



typical examples are represented in figs. 96 to 100, are 

 extremely numerous. In our own island they may be 

 seen on almost every down ; in the Orkneys alone it is 



