ten o'clock
`` Good night , Simpson , '' said the Admiral , when his flag lieutenant reported that the message was in the hands of the wireless operator . `` Shall I leave any instructions for your being called , sir ? '' asked Lieutenant Simpson . `` Have me called at ten o'clock , unless a reply from the Navy Department should arrive earlier . In that case have me called at once . '' The flag lieutenant is the personal aide of the fleet commander . If the Admiral received an interesting reply from the Navy Department during the voyage to Naples , he at least concealed the fact from Ensigns Darrin and Dalzell .