_The author fell seriously ill and spent several weeks from the
beginning of January, 1917, in the hospital at Châlons-sur-Marne._
_At the end of February, 1917, he again took up his work with General
Pétain._
_In the attack of Mont-sans-Nom, he accompanied the Morocco Division
(Champagne, April 17, 1917)._
_Captain Capart left France June 2, 1917, for the United States as a
member of a Scientific Mission which collaborated with officials of
this Government just two months after America became an Ally against
Prussianism._