HMS Unicorn was a 32-gun fifth-rate Pallas-class frigate of the Royal Navy, launched in 1794 at Chatham. This frigate served in both the French Revolutionary Wars and the Napoleonic Wars, including a medal action early in her career. She was broken up in 1815.
Unicorn
The capture of the French frigate Tribune by HMS Unicorn, by Nicholas Pocock
HMS Amethyst was a Royal Navy 36-gun Penelope-class fifth-rate frigate, launched in 1799 at Deptford. Amethyst served in the French Revolutionary Wars and the Napoleonic Wars, capturing several prizes. She also participated in two boat actions and two ship actions that won her crew clasps to the Naval General Service Medal. She was broken up in 1811 after suffering severe damage in a storm.
Capture of the Thétis by HMS Amethyst on 10 November 1808, by Thomas Whitcombe
Sir Michael Seymour, Ist Baronet
Combat de la frégate Niemen contre les frégates Aréthusa et Amethyst, by Jean-Baptiste Henri Durand-Brager
A view of HMS Amethyst capturing the French frigate Niemen in the Cordouan Shoals on 6 April 1809, by Robert Dodd