There is a reference to him on this French language website, a little over halfway down. The writing is dated 1969 and although I didn't read it all , it seems to deal with the Polish uprising during WWII. It says that after they were shot down, Robert Orlando Peterson and navigator Philip Anderson fought with them (presumably the Polish partisans) and then they were evacuated to England via Odessa on the Black Sea. The writer then goes on to say: "Twenty three years later I met Orlando and . . . we recognized each other immediately."
This would suggest that Peterson may have still been alive 23 years after 1944, in 1967.
http://www.rootschat.com/links/01lpy/