↑ At that time Reynaldo Hahn was in Argonne: see the postcard from Hahn to Proust [shortly before 5 March? 1915] (CP 02913; Kolb, XIV, no. 24) or Proust's letter to Robert de Billy [between 8 and 11 April 1915], p. 6 (CP 02915; Kolb, XIV, no. 26). [PW, FL]