I still wonder if anyone knows more about Richard? The only other thing I can add is that he didn't marry and, to the best of my knowledge, didn't have any children.
Also that so many of the children of Mossy, raised in the most liberal traditions of Vicky & Fritz, turned to Nazism--it just puzzles me. They weren't just casual, 'oh it was the time' members either--they were pretty serious. I wonder what Mossy thought of her sons involvement?