In Adrienne:Marquise de la Fayette by Andre Maurois(Cape 1961) the Mouchy couple and their daughter are arrested at the chateaux de Mouchy in the Oise region on October 16th 1793 and were eventually imprisoned in the Luxembourg till the Duchesse de Duras was transferred to Chantilly.... The couple were eventually executed on the following June 27th.In prison the Duke formerly hot tempered but not a libertine like his elder brother seems to have found great serenity....In Paris in the Terror by Stanley Loomis (Cape,1965)...the Mouchys last days are also recorded and also the fact that Madame de Mouchy was found to have been arrested with charge !!! this did not bother the revolutionary council who on the same day in the same batch condemned 2 women of the same name..because they could not bother to find out which was the one who had been charged !!!