Well here's a story...........I was at a Yoga class, (I know it's very middle England) and the Yogi is from Prague....got chatting with him and it turns out his great grandfather was in the Kuk. Any way next lesson he rocks up with this and says is it of any interest to me ?
Looked at page 424 of the Emperor's Coat by Stefan Rest and there is an identical example !
You can't make story's like this up !!!!!!!!!!!