Philippe's next vessel was HMS Flora, where he is reported as meeting Empress Catherine of Russia; and on a return trip was influenced by a French scientific team at Copenhagen.

[9] During 1774 d'Auvergne continued his scientific education and also prepared sketches for the journal Voyage towards the North Pole by Captain Constantine Phipps, 2nd Baron Mulgrave.

Paul Revere had already warned the Yankees of the attack, resulting in the British force of 800 being reduced by 73 dead and 185 injured by the pursuing American militia.

[12]: 29 [13] On 25 October 1777 d'Auvergne captured the Delaware with a company of Grenadiers;[14] and on 27 May 1778 landed a party of marines at Fogland Ferry, successfully destroying the guard house.

One choice for an heir was a Breton soldier, Théophile Malo Corret, who claimed descent of an illegitimate half brother to Henri de la Tour d'Auvergne, the Marshal of France.

D'Auvergne was exchanged with French prisoners of war and returned to England in the spring of 1780, In June he was appointed to HMS Lark.

During March 1781 Lark sailed as part of an invasion fleet against the Cape of Good Hope under the command of Commodore George Johnston.

After a brief pursuit, Commodore Johnstone chose to stay and make repairs to the damaged ships, enabling the French fleet to reach the Cape first.

The British fleet failed to land at the Cape, but they did capture five Dutch East Indiamen in the "battle" of Saldanha Bay before heading back to England.

[a] Rattlesnake and Jupiter were sent to survey Trindade and Martim Vaz, to establish the islands suitability for a base for outward-bound Indiamen.

[19] On the evening of 21 October 1781 during a heavy storm, Rattlesnake lost her anchor rope and in trying to get to sea struck a rock and was run ashore; Jupiter picked up five sailors.

D'Auvergne and his people remained on the island until 27 December 1782, when by chance, HMS Bristol, escorting East Indiamen, passed by.

Between 1784 and 1787 d'Auvergne spent time travelling and escorted John Townsend son of Thomas Townshend, 1st Viscount Sydney on a Grand Tour.

[23] In 1787 he was appointed a Revenue officer in Jersey, on board HMS Narcissus, a post he continued in until 1789 when he asked to be relieved due to ill health.

By 1794, after a petition from the Defence Committee of the Islands, and a letter from d'Auvergne to the Admiralty, he was appointed as commander of the floating battery Nonsuch and Senior of Officer of Gunboats in Jersey.

[12]: 85  Not only was d'Auvergne involved in the administration of French Emigres who had flocked to Jersey and passing intelligence to London, he also supported the attempted invasion at Quiberon.

British and émigré forces landed at Quiberon to support the Chouans and the French Royalist and Catholic Armies on 21 July 1795.

A regular visitor to Jersey was Georges Cadoudal, the Chouan leader implicated in an attempt on Christmas Eve 1800 to assassinate Napoleon Bonaparte, in rue Saint-Nicaise Paris.

A barrel of gunpowder concealed in a water cart was detonated as Bonaparte's carriage went by, but it was ignited too late, and the First Consul was only showered with broken glass.

Jacques Leopold died on 3 March 1802 without issue, and Philippe d'Auvergne used the full title and dignity of Duke after this date.

After the Peace of Amiens on 25 March 1802, d'Auvergne headed to Paris to fight a claim by another apparent heir, but on his arrival, the French police, knowing of his actions in Jersey, dragged him from his hotel without any charge, or any explanation and threw him in jail.

Correspondence from Mr Merry, Ambassador in Paris, complains of the French authorities actions and states that d'Auvergne was held for five days, and when released was given only 24 hours to leave France, a near impossibility at that time.

As soon as Prigent was captured, he gave up every detail he knew about the correspondence, including landing places, codes and safe houses used by d'Auvergne's spies.

1808 saw d'Auvergne promoted to the rank of Rear-Admiral and put in charge of naval ships in the Channel Islands although as he was not afloat, could not benefit from prize monies.

[12]: 117  In 1809 Napoleon confirmed an order to confiscate all assets of the Bouillon family, granting d'Auvergne's Château de Navarre to his divorced wife, Josephine.

[12]: 119 On hearing Napoleon had returned to power in 1815, d'Auvergne went to Brussels and marched to war with a small regiment formed in the colours of Bouillon.

Nine days before the Battle of Waterloo, d'Auvergne discovered that the Congress of Vienna, which was allowed by the Treaty of Paris to rewrite the map of Europe, had decided to form the United Kingdom of the Netherlands as a buffer state along the northern border of France.

[12]: 119 Although the independence of the Duchy was lost, there were rights to the estates (including some in France), however further complications came in the form of another claimant to the throne, Prince Charles de Rohan (who was a grandson of a half-sister of the 6th Duke).

Whilst d'Auvergne was away, the Congress decided to uphold the arbitrators decision in favor of the claim by Rohan, the blood relation.

1800), married to Admiral John Aplin; and Philip, who died a midshipman aboard HMS Africaine at Colombo in 1815,[4] and was buried 19 March 1815 at St Peters ("The Fort").