When I was sixteen, only one family in my neighbourhood conspicuously celebrated Hallowe'en . This was an American family who, it seemed to me, were having more fun at this time of year than everyone else. Every day in the week leading up to the 31st October I noticed new ghoulish decorations attached to the front of their house and increasingly excited children returning home. Today, I see carved pumpkins in almost every other window. Trick-or-treating is more popular in Britain than ever, and more of us are adopting US-style costumes and make-up for the night. But beyond the orange decorations and spooky costumes lies a serious tradition. Hallowe'en - or All Hallows' Even(ing) - held great meaning for many of our ancestors. Different regions had unique ways of counting the hours until the Christian feast of All Saints' Day (All Hallows or Hallowmas) on the 1st November. The origins of the festival appear to be non-Christian, coming from the ancient Celtic night...