Robert André-Michel (1884-1914) married Rose-Marie in 1913. Only a year later he left for the front during World War I. Robert was killed in action October 13, 1914. He would have been 30 years old when he died.
So aparently, from what Ross tells me in his letter (see Rose-Marie), both Robert and Rose-Marie were amature art historians. Hey, I'm liking this couple more all the time.
It comes from "Avignon:
du Palais des Papes" published 1920 by Armand Colin. Introduction
M. André Hallays.