St.Cyr and his kin had found their masters, in those same plebeians whom they had despised.

Armand and Marguerite, both intellectual, thinking beings, adopted with the enthusiasm of their years the Utopian doctrines of the Revolution, while the Marquis de St.Cyr and his family fought inch by inch for the retention of those privileges which had placed them socially above their fellow-men.

Marguerite, impulsive, thoughtless, not calculating the purport of her words, still smarting under the terrible insult her brother had suffered at the Marquis' hands, happened to hear--amongst her own coterie--that the St.Cyrs were in treasonable correspondence with Austria, hoping to obtain the Emperor's support to quell the growing revolution in their own country.
In those days one denunciation was sufficient: Marguerite's few thoughtless words anent the Marquis de St.Cyr bore fruit within twenty-four hours.

He was arrested.

His papers were searched: letters from the Austrian Emperor, promising to send troops against the Paris populace, were found in his desk.