has clear implications for the chronological order of the writing of these books. What are we to make of it? It appears incongruous. Consider for a moment that Limerick City in Ireland was once (during its Norman period) a walled city. The locals today still speak of the ‘walls of Limerick’ and they are mentioned in literary and historical sources. However, there are no ‘walls of Limerick’! All that remains of those walls are a few ruins. Nevertheless those remnants exist in sufficient quantity in