DIRK GERRITZ ARCHIPELAGO. 



183 



The account is interesting of " balls formed of sand 

 and cement" found in other parts of the island "lying on 

 supports of the same " ; they presented an appearance as 

 though formed "by the hand of man ". Dr. Donald who 

 saw these balls describes them as composed of concentric 

 layers, which leads to the inference that they were columns 

 of basalt which had crumbled into concentric scaled balls, 

 and this is not rare in basalt, and similarly in diabas and 



Cockburn Island and Admiralty Bay (after Ross). 



trachite. Larsen mentions no vegetation, which is all the 

 more remarkable as Hooker found a comparatively rich 

 flora existing close to Cockburn Island. 



Cockburn Island on which Ross landed lies at the 

 entrance to Admiralty Bay, nearer to Seymour Island 

 than to Mount Haddington. As with Seymour Island 

 Ross found it entirely free from snow, as well on the 

 somewhat elevated southern as on the lower northern 

 side. According- to his account the island reaches a 



