HA, great minds. I was actually thinking Polly for 72, but had thought of squeezing Mary in there in one part -- slices where Polly experiences magic or learns something unexpected and I'm sort of smitten with the idea of Mary and Polly crossing the desert on camels.

I've actually got a Dr Who idea for 159 that returns me to the Oxford Museum of Natural History and dinosaurs... Though I also love an Aravis and Hwin story -- I could do both.... decisions decisions...