On 17 June 1813, Valiant was in company with Acasta when they came upon HMS Wasp in pursuit of an American brig off Cape Sable. The three British ships continued the chase for another 100 miles before they finally were able to capture the brig. She was the letter of marquePorcupine, of more than 300 tons, and was carrying a valuable cargo of brandy, wine, silks, dry goods and other merchandise from Bayonne to Boston. Captain Robert Dudley Oliver of Valiant described Porcupine as being only eight months old and an uncommonly fast sailer. After the capture, Wasp, which had recaptured a prize that the privateer Young Teazer had taken, sailed in search of the privateer.