This Roman Catholic missal, the prayer book used by the priest when celebrating Mass, was printed at the famous Plantin Press in Antwerp, which for a long time had a monopoly on Vatican liturgical books in various countries. It was a gift to me from my parents when I was training to be a priest myself in the 1970s, and they found it, I believe, in a house sale.
The missal clearly received much use, as can be seen by the heavily worn pages, especially those used most frequently describing the Canon of the Mass - now known as the Eucharistic Prayer. The picture shows the missal open at one of these pages, although the signs of wear do not come out so clearly.
Given that the missal was found locally in Wales, it seems likely that this was used by a Catholic priest or priests in these parts during the time when Catholics were persecuted in Britain. Many were martyred, including two in my home city of Cardiff. Whoever the priests were who used this book, it puts me in touch with a story from the past of which I am still a part in the present, and perhaps prevents me from taking the religious freedom of the present too lightly.