(Above: H. A. Rey, unpublished drawing, United States, c. 1950s-60s, pencil on paper. H. A. & Margret Rey Papers, de Grummond Children's Literature Collection, McCain Library and Archives, The University of Southern Mississippi via the Curious George Saves the Day: The Art of Margret and H. A. Rey site.)
From a September 16, 2012 episode of CBS Sunday Morning: here's the story of H.A. and Margret Rey, who fled the Nazis in 1940, on bicycle, with the first CURIOUS GEORGE manuscript. Included is an interview with Margret from 1996.
"We did only what we liked, and by nice coincidence the children liked the same thing."