A correspondent writes: I was fascinated by the part in your article about Moura where you describe it as: " the fifth of four (seasons), and the thirteenth of twelve (months)". The thirteenth of twelve is a powerful idea found throughout history and is associated with eating and being gathered about a table - the Last Supper with the twelve Apostles, and Christ as the thirteenth, the Round Table with the twelve knights and King Arthur as the thirteenth. Another popular twelve/thirteen is the "baker's dozen" where a dozen loaves is actually thirteen, and this is again connected with eating. There have been various attempts to explain this in terms of mediaeval laws, but none of them seem to be actually true. On the other hand, the culmination of the Eastre event in the Scriptures takes place at a table (Altar) and is concerned with bread:

17. And She stood at the great Altar and took up a wheaten loaf, and spoke, saying: 18. Like to the corn, My body was cut down by the scythe of death; and like to the corn did it rise anew. 19. For I am the ear of corn that is reaped in silence. 20. And She said: Like to the grain was my body broken between the stones of death. And saying thus, She broke the bread between Her hands.

All this seems more than coincidence to me!