But doesn't help with Amersham.

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All I can say concerning Amersham is that if you can attend the Craft Fair (um better catch plane now), you could be as lucky as I was a couple of years ago I found a super duper bat brooch, complete with sun and moon.
We stopped in Amersham for a meal, and stood in awe at the beautiful traditional cottages and the absolutely incredible olde wordly feeling..