PRSVRYPRFCTMN VRKPTHSPRCPTSTN.
Deacon Green says that these letters were found on a wall in a church in Wales, painted, like a text, above an inscription of the ten commandments.
Some of you may have seen it before, he thinks; but, if not, it will be good fun for you to find out what it means. He adds that there is but one letter of the alphabet wanting, to make sense; this is used over and over, and, if you put it into the right places, the text will turn into a rhymed couplet.