Thérèse Malye served as Mildred Barnes Bliss's Parisian secretary. She dealt with their correspondence and cared for their apartment during periods when they lived away from Paris. According to Robert Woods Bliss's office notes, now housed at Harvard University, Thérèse Malye was employed by the Blisses during the period from 1939 to 1948, possibly longer.
References:
"Bliss, Robert Woods, 1875-1962. Papers of Robert Woods Bliss and Mildred Barnes Bliss: an inventory." oasis.lib.harvard.edu. Last modified May 14 2013. http://oasis.lib.harvard.edu/oasis/deliver/~hua26003
Elisina Tyler to Robert Woods Bliss, October 14, 1925. Bliss-Tyler Correspondence, Dumbarton Oaks Research Library & Collection. Last modified June 2, 2014. http://www.doaks.org/resources/bliss-tyler-correspondence/1920-1927/14oct1925