At 23:00 on 30 March, with a strong wind from the south,
Guillaume Tell sailed from Valletta, Decrès hoping to use the cover of darkness to escape the British blockade. Dixon had deployed his ships around the island, with Valletta watched by the frigate under Captain
Henry Blackwood. Blackwood also attempted to signal his discovery to his commanding officer as
Penelope gave chase. Blackwood rapidly gained on the ship of the line and by 00:30 the frigate was within range, pulling up under the stern of
Guillaume Tell and beginning a steady fire to which Decrès could respond with only his stern-chasers, light cannon situated in the stern of the ship. Decrès recognised that if he stopped to engage
Penelope then the rest of Berry's squadron, visible on the horizon to the south, would soon overwhelm him. He therefore continued sailing to the northeast, hoping his heavy ship of the line could outrun the light and speedy frigate. However,
Penelope was too fast, and Blackwood handled his ship with considerable skill, managing to pass Decrès' stern repeatedly and pour several
raking broadsides into the French ship. Blackwood's attack was so successful that by dawn on 31 March
Guillaume Tell had lost its main and mizzen topmasts and its main yard, considerably reducing the speed at which Decrès could travel. The French ship had also suffered heavy casualties in the exchange, but
Penelope had lost only one man killed and three wounded, and was almost undamaged. By 05:00, Dixon was close enough to engage, passing between
Penelope and
Guillaume Tell and firing a triple-shotted broadside into the
port side of the French ship. Shooting ahead of the now sluggish
Guillaume Tell,
Lion crossed its opponent's bows and shot away the
jib boom, allowing Dixon to maintain a position across the bow, raking the French ship from one end while
Penelope did the same to the other. For half an hour,
Lion continued to fire into the larger
Guillaume Tell, but Dixon was unable to keep his ship completely out of range of the French broadsides and by 05:30 the subsequent damage showed an effect,
Lion dropping back and falling behind the French vessel, although remaining within range alongside
Penelope. By 06:30 the badly outnumbered French ship had lost both its main and mizen masts,
Foudroyant returning to the battle in time to collapse the foremast by 08:00. At 08:20, with no means of making sail and with wreckage obscuring most of his gun decks, Decrès surrendered to spare any further, fruitless, loss of life. His ship was in danger: the lack of masts and strong winds caused it to roll so severely that the lower deck gun ports had to be closed to prevent the ship from foundering. Casualties on the French ship numbered more than 200, from a crew of over 900, British losses were lighter, with eight killed and 64 wounded, including Berry, in
Foudroyant, eight killed and 38 wounded in
Lion and one killed and three wounded (one fatally) in
Penelope. Damage was unevenly spread,
Foudroyant suffering most severely, with the hull and all masts damaged, the mizzenmast so badly that it collapsed at approximately 12:00, wounding five more men.
Lion was badly hit, although not so severely as
Foudroyant while
Penelope was only lightly damaged in the masts and rigging. The battle, which had begun within sight of Malta, had concluded roughly south-west of
Cape Passaro on Sicily. ==Aftermath==