Preservationists restoring an 18th century statue of Jesus that was hanging in Burgos, Spain's church of St. Águeda found a two handwritten letters tucked into the figure's buttocks. Dated 1777, the notes were written by chaplin Joaquín Mínguez from the Burgo de Osma cathedral. The letters will be archived by the office of the Archibishop of Burgos while copies were put back into the statue's bottom. From National Geographic:
In his letters, Mínguez paints a picture of the region's day-to-day economic and cultural activity. The chaplain first notes that the statue was created by a man named Manuel Bal, who created other wooden statues for churches in the region. He then describes the successful harvests of various grains like wheat, rye, oats, and barley and stores of wine.
Mínguez also names diseases like malaria and typhoid fever plaguing the village during this time period, but adds that cards and balls were used for entertainment.
https://www.youtube.com/watch?v=0uJHGDHiTFg