GRANITE DYKE. 



63 



other country, 1 -should probably have at once as- 

 sented, without further examination. It was not, 

 indeed, until I detected several oblique joints at dif- 

 ferent distances, cutting through the whole wall and 

 quite parallel one to the other, that 1 could entirely 

 satisfy myself of its strictly natural character. 



The granite did not greatly differ in mineral cha- 

 racter from the rest of the rock which surrounded it, 

 but much in its jointed structure, as the neighbour- 

 ing rock was traversed only by planes at a distance 

 of several feet or yards apart, forming very large 

 cnboidal blocks. 



We returned to Cape Upstart on May 5, and on 

 the 10th, as the pinnace was not yet quite completed, 

 Captain Blackwood, with Lieut. Ince and myself, set 

 off to look for an inlet on the opposite side the bay to 

 our anchorage, where we had been informed by 

 Captain Wickham, there was a freshwater river. A 



