3i6 



The Irish Naturalist. 



[Dec, 



steam on round the rock. Repassing view No. i, a little 

 nearer, it is evident that the supposed " roots of tangle are 

 pittings, and that the reddish patches below are something 

 organic, not colouring of the rock, which is grey only. The 

 Hazlewood rock, which shows a conical point between every 

 sea, is dark brown from growth of sea-weeds. 



Outline Skktchks of Rockall showing jointing of 



THE Rock. 



I. Looking n.e- \ n. 



2. Looking w. 3. Looking s.e. by s. 



12.45 P.M., Sunday, June 7« — To continue from yesterday. 

 We steamed right round the rock, keeping as close as we safely 

 could — about 400 yards. Numbers of Guillemots on the top, 

 and a few gulls. About half of them rose and dropped down 

 into the water when Barrington fired a shot. I judge the 

 rock to be granite (in a generic sense) from its uniform colour 

 and texture and its massive jointing. A kind of crack runs 

 across the north-westerly face, about one-third way up from 

 the water, and dipping southward — and here the rock looks 

 flaky ; otherwise it appears homogeneous, with few straight 

 joints, as shown in my three outline sketches. 



Having seen all we could of the rock, we fell away, and 

 presently took a sounding a couple of miles to leeward. 

 Depth 50 fathoms — we lost the sounder as usual. The biggest 

 dredge was sent down. On hauling up, the dredge was gone, 

 completely torn away, and the ropes all frayed from their 

 contact with the rocky bottom. The only specimen obtained 



