HMS Mermaid was a 32-gun Active-class fifth-rate frigate of the Royal Navy, launched in 1784 and broken up in 1815. During the French Revolutionary Wars she served in the West Indies, the Channel, and the Mediterranean. During the Napoleonic Wars she first served in the Americas, but from early 1811 on, she was armed en flute and served as a troopship until she was broken up.
Mermaid captures Brutus
HMS Castor was a 32-gun Amazon-class fifth-rate frigate of the Royal Navy. She served during the French Revolutionary and Napoleonic Wars. The French briefly captured her during the Atlantic Campaign of May 1794 but she spent just 20 days in French hands as a British ship retook her before her prize crew could reach a French port. Castor eventually saw service in many of the theatres of the wars, spending time in the waters off the British Isles, in the Mediterranean and Atlantic, as well as the Caribbean.
Print by Thomas Whitcombe depicting HMS Carysfort retaking Castor from the French on 29 May 1794