A secret in his mouth
Is like a wild bird put into a cage,
Whose door no sooner opens but 'tis out.

In family history, some of the strangest secrets have related to concealment of birth, many a fraud having been devised to alter or perpetuate the line of issue. Early in the present century, a romantic story which was the subject of conversation in the circles both of London and Paris, related to Lady Newborough, who had always considered herself the daughter of Lorenzo Chiappini, formerly gaoler of Modigliana, and subsequently constable at Florence, and of his wife Vincenzia Diligenti. Possessed in her girlhood of fascinating appearance and charming manners, she came out as a ballet dancer at the principal opera at Florence, and one night she so impressed Lord Newborough that, by means of a golden bribe, he had her transferred from the stage to his residence. His conduct towards her was tender and affectionate, and, in spite of the disparity of years, he afterwards married her, introducing her to the London world as Lady Newborough.

Some time after her marriage, according to a memoir stated to be written by the fair claimant of the House of Orleans, and printed in Paris before the Revolution of 1830 but immediately suppressed, when staying at Sienna she received a posthumous letter from her supposed father, which, from its extraordinary disclosures, threw her into complete bewilderment.[31] It ran as follows:

My Lady,—I have at length reached the term of my days without having revealed to anyone a secret which directly concerns me and yourself. The secret is this:

On the day when you were born, of a person whom I cannot name and who now is in the other world, a male child of mine was also born. I was requested to make an exchange; and, considering the state of my finances in those days, I accepted to the often-repeated and advantageous proposals, and at that time I adopted you as my daughter in the same manner as my son was adopted by the other party.

I observe that heaven has repaired my faults by placing you in better circumstances than your father, although his rank was somewhat similar. This enables me to end my days with some comfort.

Let this serve to extenuate my culpability towards you. I entreat your pardon for my fault. I desire you, if you please, to keep this transaction secret, in order that the world shall not have any opportunity to speak of an affair which is now without remedy.

This, my letter, you will not receive until after my death.

Lorenzo Chiappini.

After receiving this letter, Lady Newborough sent for Ringrezzi, the confessor of the late gaoler, and Fabroni, a confessor of the late Countess Borghi, and was told by the former that, in his opinion, she was the daughter of the Grand Duke Leopold; but the latter disagreed, saying, "Myladi is the daughter of a French lord called Count Joinville, who had considerable property in Champagne; and I entertain no doubt that if your ladyship were to go to that province you would there find valuable documents, which I have been told were there left in the hands of a respectable ecclesiastic."