Lost to the sea.: Book 2. Letters of Marque.

his prize money James Johnson buys shares in the Stag line and sails as mate on the Schooner Annabel. When The Captain is injured he become a Captain in his own right.
He lears Captain Stag has been missing for two years and is believed to be held by pirates in the Azores.
with Charles's help, and backing from the Duke of Northumberland, he buys the French prize brig Etoil; and carrying a 'Letter of Marque' signed by the Duke, they set out to effect a rescue mission and confiscate the pirates treasure.
En-route he becomes involved in the Royal Naval Attack on the port of Brest, and later, at the request of the Duke of Northumberland he joins the Government attack and Annexation of french West African Colony of Senegal.