Erich Kästner vs H.A. Rey
In 1928, Erich Kästner published a children's book called Emil und die Detektive. The book was illustrated by Walter Trier (a Czech born Jew). The book was very popular in the German speaking world, as well as in Europe in general.
I wonder how much influence it had on the illustration style of H.A. Rey and his Curious George books?