Bluetoria, about wich Petr Volkonsky are you talking? There is a Petr Mikhalovich Volkonsky. I have to see my old notes, I have studied something about the family Volkonsky. As I remember, Petr Volkonsky was the son of Mikhail Sergeevitch Volkonsky (himself son of this Volkonsky, decembrist, who was in exile in Siberia) and princess Elizaveta Grigorievna Volkonskaia. They have 5 or 6 children, Petr, Sergei, Grigory, Maria and Vladimir (perhaps and other too, I do not remember). Elizaveta Grigorievna was a very clever woman. She converted herself to catholiscism, and wrote some books about this question. It was so serious, that the Holy Synod was forced to ask 2 great theology professor to write an answer. She had a great influence on her children, and most of them converted too. Sergei died in France, he was liberal and a great specialist on theater and wrote VERY interesting memories. As I rember Petr was specialist in question of army (theoretical questions) and wrote too some books. He lived in Kiev sometimes. He became a catholic priest. Vladimir (or Grigory) had a charge in the governement and something to do with the Comitee of Olga Nikolaevna. Sorry, I remember very few, I must read again. I hope it has helped, and that it was this part of this very big Family.