In late April, as "Revenant" was completing her preparations and plotting her route, a prize taken by the privateer "Adèle" gave news of the new war between France and Portugal; she also brought intelligence about the "Conceçáo-de-Santo-Antonio", a 64-gun ship of the line armed en flûte in Goa, bound for Rio de Janeiro and Lisbon. Surcouf gave Portier the mission to intercept, and "Revenant" departed Port-Louis on 30 April. She arrived in her patrol zone on 17 May and detected her target on the 24th. "Revenant" captured "Conceçáo-de-Santo-Antonio" after a one-hour battle. Potier put a prize crew under First Lieutenant Fonroc on "Conceçáo", and returned to Mauritius one month later with his prize.