Korczak and the white chapeau, so I called these two images.
The left one is from Rózyczka summer camp and the right one is from the Warsaw Ghetto.
It's Saba Lejzerowicz with the dog on the left one and then as I have seen it, there is an quite indistinct "white chapeau" in the shade. That white chapeau I always associated with Janusz Korczak.
The right image is Mary Berg. Behind her is my proposed Janusz Korczak in a white chapeau. May be?
