James Mosley kindly sent me this photo he took sometime in the 70s – self-explanatory, I think, at least in more literate times. In case you can't read it, the top line says 'Artillery danger area'. I've been reading it aloud, trying out different accents.
Jenny came back from India with this one – we're thinking of putting it on our fence and pointing it at the students across the road from us.
