 Also sailing in company with "Amethyst" were the 36-gun , (Captain Frederick Lewis Maitland), and the 38-gun , (Captain Robert Mends).Seymour, who had previously won fame by capturing the French frigate "Thétis" the previous November, gave chase at 11am.After a sustained chase lasting all day, the "Amethyst" lost sight of the "Emerald", which could not match the speed of the two others, and had failed to gain on the "Niémen".