It used to be a common device of pirates when in chase of a vessel to tow behind them a spare topmast, or some other bulky object. This would act as a drogue, or brake: and the pursued, seeing them with all sail set apparently doing their utmost, would underestimate their powers of speed. Then when night fell the pirate would haul the spar on board, overtake the other vessel rapidly, and catch it unprepared.
There were several reasons why this device was unsuitable to the present occasion. First and most obviously, it was doubtful whether, in their present condition, they were capable of overtaking the brig at all, leaving such handicaps altogether out of consideration. A second was that the brig showed no signs of alarm. She was proceeding on her voyage at her natural pace, quite unaware of the honour they were doing her.