I have now ascertained that an American privateer,the"General Armstrong", was involved in an action, in the harbour of Horta , in The Azores , in September 1814, with a British squadron, under the command of Captain Robert Lloyd,of the 74-gun "Plantagenet" . Another ship of this squadron was the 38-gun frigate "Rota" , captured at Copenhagen , and now under the command of Catain Philip Somerville . Eureka ?? I'll investigate further,but it looks promising !