I'm finding this quiz particularly difficult this month. Congratulations to those of you who have found this answer, but it's one of six that are still outstanding for our team. There are four of us working on them, two trawling the internet and two looking through every possible reference book we can find; I hate leaving gaps, but short of making silly guesses that's what I'll have to do this time. I respect the setter's request not to ask for answers, and will not do so, but I can fully understand why frustration can sometimes set in. We've been doing the quiz (first 50 questions only) for a few months now and haven't done too badly - though never quite with full marks - but this one is going to be our worst by far.