At Berny, Clermont erected a private theatre, upon whose stage the fair châtelaine, we may presume, occasionally condescended to appear, though Gaboriau is indebted to his imagination for the statement that she was in the habit of dancing "_pour la plus grande joie des moines ravis_,"[112] as the château was the private residence of the abbot, to which his subordinates were never admitted. If they desired to see their superior on business connected with the abbey, they had to present themselves at his hôtel in the Rue de Richelieu. Mlle. de Camargo presided over the Château of Berny for some four years, when an obscure _figurante_ of the Opera, Mlle. Le Duc by name, "a creature without intelligence, without manners, without principles, without a soul,"[113] stole away the heart of the Comte de Clermont. Mlle. Le Duc was the property of Président de Rieux, son of the celebrated financier, Samuel Bernard, who, having purchased the lady's affections at a great price, was naturally reluctant to surrender them. To oppose himself to a Prince of the Blood in an affair of such importance was more, however, than he had the courage to do; and so, one day, while the president was dispensing justice in the Cour des Enquêtes, Mlle. Le Duc bade farewell to the luxurious nest which the luckless judge had furnished for her, and transferred herself and her belongings to Berny. Henceforth, the president lived only for revenge, and racked his brains to discover some means whereby he might humble the pride of the Comte de Clermont, and make the faithless Le Duc bitterly rue the day on which she had so basely betrayed him. At length, he resolved upon the following plan of campaign: he would invite Mlle. de Camargo to occupy the vacant place in his affections, and surround her with such luxury, array her in such toilettes, load her with such presents as would cause Mlle. Le Duc to die of envy, and her monkish lover to gnaw his fingers with vexation. He accordingly made overtures to the deserted ballerina, which were promptly accepted; and one morning all Paris was talking of the magnificent generosity of the Président de Rieux, who had sent his new mistress a chastely-wrought bowl of solid gold, filled to the brim with double louis. The Comte de Clermont heard of the president's gift, and hastened to accept the challenge. In the _Journal de Police_, under date March 1742, we read:-- "On Thursday, March 22, 1742, the Demoiselle Le Duc, formerly mistress of the Président de Rieux, drove to the _Tenebrae_ at Longchamps[114] in a _calèche_ of cane painted blue, with all the chains of silver, drawn by six ponies no bigger than dogs, ridden by a little postilion and a little hussar, the first in a red waistcoat all galooned with silver, and with a blue plume in his hat; the other in a blue tunic, with his sabre and cap decorated with _plaques_ of silver. The Le Duc held the horses' reins, and was escorted by two footmen.