The pleurisy, being ill cured, assumed and retained all the symptoms of consumption; the Dauphin languished from that period until December, 1765, and died at Fontainebleau, where the Court, on account of his condition, had prolonged its stay, which usually ended on the 2d of November.
"The Dauphiness, his widow, was deeply afflicted; but the immoderate despair which characterised her grief induced many to suspect that the loss of the crown was an important part of the calamity she lamented.

She long refused to eat enough to support life; she encouraged her tears to flow by placing portraits of the Dauphin in every retired part of her apartments.

She had him represented pale, and ready to expire, in a picture placed at the foot of her bed, under draperies of gray cloth, with which the chambers of the Princesses were always hung in court mournings.
Their grand cabinet was hung with black cloth, with an alcove, a canopy, and a throne, on which they received compliments of condolence after the first period of the deep mourning.

The Dauphiness, some months before the end of her career, regretted her conduct in abridging it; but it was too late; the fatal blow had been struck.

It may also be presumed that living with a consumptive, man had contributed to her complaint.