174 



ROCK SCULPTURES. 



clue to the meaning of these engravings, many of which have 

 been figured by Mr. Tate and Sir J. Y. Simpson. They occur 



FIG. 161. 



Rock Sculptui-es. Scotland. 



in evident association with ancient oppida and fortifications, 

 as well as on menhirs, and on the stones composing dolmens 

 and cromlechs. Fig. 161 represents a characteristic group on 

 a rock at Auchnabreach in Argyllshire. The surface of the 

 rock is well adapted to receive such sculpturings, having 

 been smoothed and prepared by glacial action. 



Similar sculpturings have been found in Ireland, where 

 also the great tumuli on the Boyne afford instances of more 

 elaborate ornamentation. The great stone at the entrance of 



Sculptured Stones of Scotland, be- in Spain, see Don M. de Gongora 



long to a much later period, and y Martinez, Antigiiedades Prehis- 



scarcely fall within the scope of the toricas de Andalucia. 

 present work. For rock carvings 



