Lloyd's List
Date format: mm-dd-yyyy

11-27-1812 col 2
The William Rathbone, Darnault, from London to Demerary,
was captured 27th September, near Demerary Bar, by the Saucy Jack American privateer; retaken 8th October by Charybdes SW. and sent into St.Thomas's on the 12th.

Source:

McManemin, Captains of the Privateers of the War of 1812

Saucy Jack, Captain Thomas H. Jervey

On the 27 th September, 1812, off Demarara, captured the British brig William Rathbone from Liverpool, with a full cargo of Dry Goods valued at £40,000. The prize mounted fourteen 18 pounders, and two 6’s; with 29 men. She was taken without any action; the crew, with the exception of Captain and a boy were landed at Demarara. Lt Neavin and 26 men were put on board the William Rathbone and she was ordered for Charleston