It is well known, from all the memoirs of the time, that she was greatly in love with M.de Lauzun, and that she suffered much when the King withheld his permission to their marriage.
M.de Lauzun was so enraged, that he could not contain himself, and at last went so far beyond bounds, that he was sent prisoner to Pignerol, where he remained, extremely ill-treated, for ten years.

The affection of Mademoiselle did not grow cold by separation.

The King profited by it, to make M.de Lauzun buy his liberty at her expense, and thus enriched M.du Maine.

He always gave out that he had married Mademoiselle, and appeared before the King, after her death, in a long cloak, which gave great displeasure.

He also assumed ever afterwards a dark brown livery, as an external expression of his grief for Mademoiselle, of whom he had portraits everywhere.