So can you summarise (a book in 10 words - easy!) what the green men meant to the people who put them there.

UK religion is so varied. I called in a ceilidh band with an Anglican vicar. When we did church Harvest Supper dances he used hand out 'hymnsheets' to make them sing John Barleycorn to the tune We Plough the Fields and Scatter. I felt uncomfortable with that (as an exBaptist it felt like mocking their religion), but he seemed to get away with it, though I don't think they liked it much at the (teetotal)Salvation Army do.