Killegrew—Sir John has sworn an oath to rescue Lionel and Rosamund, and to hang Sakr-el-Bahr. Not realizing the proximity of the corsair, Sir John's ship comes to anchor just round the point from the hidden galley. Sir Oliver sees his chance to return Rosamund to safety, and at dusk contrives to have Lionel thrown overboard, ostensibly for insubordination, but in reality giving him secret instructions to swim round the point in the dark with a message for Sir John. Lionel reaches Sir John, and the English attempt to attack the corsairs, but the wind is very light and the Moorish galley, using her oars, is able to travel much faster than the English sailing ship. Oliver sees that they will surely escape the English ship, and hijacks command of the galley by threatening to detonate the open powder magazine with his torch. He compels the galley to allow the English ship to come alongside. The English crew boards the galley, and in an abortive fight, Lionel, who was first to board the galley, receives a pike thrust through the body from one of the Moors. Sakr-el-Bahr compels both sides to cease fighting, and negotiates a truce—he will surrender himself to Sir John, on the condition that the Moors will allow Rosamund to leave with the English, and that the English will allow the Moors to leave without further molesting them. The Basha, caught in a trap, outgunned, and furious at Sakr-el-Bahr's mutinies, is happy to give him to the English, deeming they will hang him. Sir John is content to let the Basha depart as long as Rosamund and Sir Oliver are in his custody, and the truce is agreed upon. The Basha's galley departs; Sakr-el-Bahr is flung into the hold, and told to prepare himself for execution. Rosamund, seeing Sir Oliver about to sacrifice his life to ensure her safety, realizes that she still loves him. In the cabin of the English ship, Sir John is told that Lionel is mortally wounded and will likely never recover consciousness. Sir John; Lord Henry Goade, Queen's Lieutenant of Cornwall; and the other officers of the ship form a tribunal to pass judgment on Sir Oliver before hanging him. To their surprise and dismay, Rosamund defends him fiercely, telling them the true story of what happened. They at first believe her to be mad, and then later to be deliberately lying to