rear- admiral joseph strauss and his staff on board his flagship/ the 



"black hawk" 



L,eft to right : Lieut.-Commander Noel Davis, Rear-Admiral Joseph Strauss, Lieut. W. K. 

 Harrill, and Ensign K. C. Richmond. 



MARKER BUOYS TO INDICATE THE POSITIONS OF THE LINES OF MINES WERE PLACED 

 AT INTERVALS OF THREE MILES THROUGHOUT THE LENGTH OF EACH GROUP 



Besides a differently arranged flag, each buoy was painted to show which line of mines 

 it marked and its position in the group, in much the same manner that the signs on the 

 street corners indicate the streets. The buoys were assembled on board, using the sphero- 

 cylindrical cans which are seen on the stern of the ship. 



106 



