160 



BIRD STUDIES WITH A CAMERA 



Hence, when Mr. C. J. Maynard visited the Rock 

 in 1872, he found that the colony of Gannets on its 

 summit contained only five thousand birds, which, 

 nine years later, Mr. William Brewster reports had 

 decreased to fifty pairs. Mr. Brewster also noted a 



82. A corner of tliu Kock, 



fresh cause for the destruction of the eggs of the 

 birds nesting on the sides of the Rock, in the shape 

 of a cannon which had been introduced shortly be- 

 fore his visit. He writes : " At each discharge the 

 frightened Murres fly from the Rock in clouds. 



