 When Marie Thérèse was released from Temple in 1795 and allowed to depart for Austria, Renée Suzanne de Soucy was chosen to accompany her on her journey to the border in Huningue after her mother Marie Angélique de Mackau, who had been the first choice of Marie-Therese, was forced to decline because of health.Marie-Therese, who travelled under the name Sophie, sat in the carriage with de Soucy and the guards Mechin (posing as the father of Sophie) and Gomin; the male servants Hue and Baron, the cook Meunier, as well as the maid Catherine de Varenne and a teenage boy called Pierre de Soucy followed them in the next carriage.According to the switch theory of the "Dunkelgrafen", Renée Suzanne de Soucy assisted Marie-Therese in changing place with Ernestine de Lambriquet during the trip to Austria in 1795-96.