On All Things Considered this week (Sunday 4 January at 8.30am, repeated on Wednesday 7 January at 6.30pm), there's another chance to hear Roy Jenkins heading for the Lourdes of Wales - St Winefride's Well at Holywell in Flintshire. Pilgrims have been trekking to this spot for thirteen centuries to seek healing, but in this secular and sceptical age, what relevance does the well have today? Why do people come and what about those who seek healing, but are not cured?