MM. Homberg and Jousselin, in their recent work,[42] declare that among d'Éon's papers, which lay for a century in the back shop of a London bookseller, they find letters to him, from June 1756, written by Tercier, who managed the secret of Louis XV. There are no known proofs of d'Éon's earlier presence in Russia, and in petticoats, in 1755.
He did talk later of a private letter of Louis XV., of October 4, 1763, in which the King wrote that he 'had served him usefully in the guise of a female, and must now resume it,' and that letter is published, but all the evidence, to which we shall return, tends to prove that this paper is an ingenious deceptive 'interpolation.' If the King did write it, then he was deceiving the manager of his secret policy—Tercier—for, in the note, he bids d'Éon remain in England, while he was at the same time telling Tercier that he was uneasy as to what d'Éon might do in France, when he obeyed his public orders to return.[43] If, then, the royal letter of October 4, 1763, testifying to d'Éon's feminine disguise in Russia, be genuine, Louis XV. had three strings to his bow. He had his public orders to ministers, he had his private conspiracy worked through Tercier, and he had his secret intrigue with d'Éon, of which Tercier was allowed to know nothing. This hypothesis is difficult, if not impossible, and the result is that d'Éon was not current in Russia as Douglas's pretty French niece and as reader to the Empress Elizabeth in 1755.
In 1756, in his own character as a man and a secretary, he did work under Douglas, then on his second visit, public and successful, to gain Russia to the French alliance; for, dismissed in October 1755, Douglas came back and publicly represented France at the Russian Court in July 1756. This was, to the highest degree of probability, d'Éon's first entrance into diplomacy, and he triumphed in his mission. He certainly made the acquaintance of the Princess Dashkoff, and she, as certainly, in 1769-1771, when on a visit to England, gave out that d'Éon was received by Elizabeth in a manner more appropriate to a woman than a man. It is not easy to ascertain precisely what the tattle of the Princess really amounted to, but d'Éon represents it so as to corroborate his tale about his residence at Elizabeth's Court, as lectrice, in 1755. The evidence is of no value, being a biassed third-hand report of the Russian lady's gossip. There is a mezzotint, published in 1788, from what professes to be a copy, by Angelica Kauffmann, of a portrait of d'Éon in female costume, at the age of twenty-five. If these attributions are correct, d'Éon was masquerading as a girl three years before he went to Russia, and, if the portrait is exact, was wearing the order of St. Louis ten years before it was conferred on him. The evidence as to this copy of an alleged portrait of d'Éon is full of confusions and anachronisms, and does not even prove that he thus travestied his sex in early life.
In Russia, when he joined Douglas there in the summer of 1756, d'Éon was a busy secretary of legation. In April 1757, he went back to Versailles bearing rich diplomatic sheaves with him, and one of those huge presents of money in gold, to Voltaire, which no longer come in the way of men of letters. While he was at Vienna, on his way back to St. Petersburg, tidings came of the battle of Prague; d'Éon hurried to Versailles with the news, and, though he broke his leg in a carriage accident, he beat the messenger whom Count Kaunitz officially despatched, by thirty-six hours. This unladylike proof of energy and endurance procured for d'Éon a gold snuff-box (Elizabeth only gave him a trumpery snuff-box in tortoiseshell), with the King's miniature, a good deal of money, and a commission in the dragoons, for the little man's heart was really set on a military rather than a diplomatic career. However, as diplomat he ferreted out an important secret of Russian internal treachery, and rejected a bribe of a diamond of great value. The money's worth of the diamond was to be paid to him by his own Government, but he no more got that than he got the 10,000 livres for his travelling expenses.
Thus early was he accommodated with a grievance, and because d'Éon had not the wisdom to see that a man with grievances is a ruined man, he overthrew, later, a promising career, in the violence of his attempts to obtain redress. This was d'Éon's bane, and the cause of the ruinous eccentricities for which he is remembered. In 1759 he ably seconded the egregious Louis XV. in upsetting the policy which de Choiseul was carrying on by the King's orders. De Choiseul's duty was to make the Empress mediate for peace in the Seven Years' War. The duty of d'Éon was to secure the failure of de Choiseul, without the knowledge of the French ambassador, the Marquis de l'Hospital, of whom he was the secretary. Possessed of this pretty secret, d'Éon was a man whom Louis could not safely offend and snub, and d'Éon must therefore have thought that there could scarcely be a limit to his success in life. But he disliked Russia, and left it for good in August 1760.
He received a life pension of 2,000 livres, and was appointed aide-de-camp to the Maréchal de Broglie, commanding on the Upper Rhine. He distinguished himself, in August 1761, by a very gallant piece of service in which, he says, truly or not, he incurred the ill-will of the Comte de Guerchy. The pair were destined to ruin each other a few years later. D'Éon also declares that he led a force which 'dislodged the Highland mountaineers in a gorge of the mountain at Einbeck.' I know not what Highland regiment is intended, but D'Éon's orders bear that he was to withdraw troops opposed to the Highlanders, and a certificate in his favour from the Duc and the Comte de Broglie does not allude to the circumstance that, instead of retreating before the plaids, he drove them back to the English camp. It may therefore be surmised that, though D'Éon often distinguished himself, and was wounded in the thigh at Ultrop, his claim of a victory over a Highland regiment is—'an interpolation.' De Broglie writes, 'we purpose retreating. I send M. d'Éon to withdraw the Swiss and Grenadiers of Champagne, who are holding in check the Scottish Highlanders lining the wood on the crest of the mountain, whence they have caused us much annoyance.' The English outposts were driven in; but, after that was done, the French advance was checked by the plaided Gael: d'Éon did not
quell the mountaineer
As their tinchel quells the game.
Not a word is said about his triumph even in the certificate of the two de Broglies which d'Éon published in 1764.
In 1762, France and England, weary of war, began the preliminaries of peace, and d'Éon was attached as secretary of legation to the French negotiator in London, the Duc de Nivernais, who was on terms so intimate with Madame de Pompadour that she addressed him, in writing, as petit époux. In the language of the affections as employed by the black natives of Australia, this would have meant that de Nivernais was the recognised rival of Louis XV. in the favour of the lady; but the inference must not be carried to that length. There are different versions of a trick which d'Éon, as secretary, played on Mr. Robert Wood, author of an interesting work on Homer, and with the Jacobite savant, Jemmy Dawkins, the explorer of Palmyra. The story as given by Nivernais is the most intelligible account. Mr. Wood, as under secretary of state, brought to Nivernais, and read to him, a diplomatic document, but gave him no copy. D'Éon, however, opened Wood's portfolio, while he dined with Nivernais, and had the paper transcribed. To this d'Éon himself adds that he had given Wood more than his 'whack,' during dinner, of a heady wine grown in the vineyards of his native Tonnerre.
In short, the little man was so serviceable that, in the autumn of 1762, de Nivernais proposed to leave him in England, as interim Minister, after the Duc's own return to France. 'Little d'Éon is very active, very discreet, never curious or officious, neither distrustful nor a cause of distrust in others.' De Nivernais was so pleased with him, and so anxious for his promotion, that he induced the British Ministers, contrary to all precedent, to send d'Éon, instead of a British subject, to Paris with the treaty, for ratification. He then received from Louis XV. the order of St. Louis, and, as de Nivernais was weary of England, where he had an eternal cold, and resigned, d'Éon was made minister plenipotentiary in London till the arrival of the new ambassador, de Guerchy.