Just how Hallowe'en – All-Hallows Eve, the eve before All Saints’ Day – has become so associated with the idea of spirits walking abroad, all decidedly diabolical rather than saintly, isn’t quite clear. But celebrated it certainly is. For children, it's probably the most important non-sectarian festival; for others, as ‘the night of Samhain’, it represents the first day of winter – but alongside and below these secular, pagan aspects, its religious roots run deep. The festival of the Mexican Day of the Dead falling at this time, draws on an even older Aztec culture. These festivities were devoted to the Lady of the Dead, who was transformed into (the rather more Roman Catholic) Catrina. She appears as a partially dressed jolly skeleton, the whole festival enjoying a humorous carnival atmosphere, with an emphasis on food and drink, as well as music and dancing. Enough talk, let's party! Calaveras I heard that merry dancing long befor...