186 BIRD STUDIES WITH A CAMERA 
Later, the fog, which had been scudding over us 
in wisps and ribbons, closed in, and through the 
medium of a guncotton bomb the Rock gave notice 
99. Gannets on nests. 
of its presence to the mariners who might be in the 
surrounding waters. Captain Taker heard the dull, 
booming voice as with disappointing promptness he 
